Interpretation of Incidence Rates Data
Incidence Rate Report by State
Colon & Rectum (All Stages^), 2014-2018
All Races (includes Hispanic), Both Sexes, All Ages
Sorted by Recentaapc
Explanation of Column HeadersObjective - The objective of 39.9 is from the Healthy People 2020 project done by the Centers for Disease Control and Prevention.
Incidence Rate (95% Confidence Interval) - The incidence rate is based upon 100,000 people and is an annual rate (or average annual rate) based on the time period indicated. Rates are age-adjusted by 5-year age groups to the 2000 U.S. standard million population.Recent Trends - This is an interpretation of the AAPC/APC:
- Rising when 95% confidence interval of AAPC/APC is above 0.
- Stable when 95% confidence interval of AAPC/APC includes 0.
- Falling when 95% confidence interval of AAPC/APC is below 0.
AAPC/APC (95% Confidence Interval) - the change in rate over time
- Average Annual Percent Change - AAPCs are based upon APCs that were calculated by Joinpoint Regression Program
- Annual Percent Change - APCs calculated in SEER*Stat.
Other Notes
- Larger confidence intervals indicate less stability of the data. This is often due to low counts that are not quite low enough to be suppressed.
- Data is currently being suppressed if there are fewer than 16 counts for the time period.
Line by Line Interpretation of the Report
US (SEER+NPCR)1
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 38.0 with a 95% confidence interval from 37.9 to 38.1 and 143,200 average annual cases over 2014-2018.
- CI*Rank⋔ : N/A
- Recent Trend : The trend is falling
because the trend is -1.8 with a 95% confidence interval from -2.3 to -1.2.
Rhode Island6
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 33.7 with a 95% confidence interval from 32.2 to 35.1 and 447 average annual cases over 2014-2018.
- CI*Rank⋔ : 46 (37, 50)
- Recent Trend : The trend is falling
because the trend is -4.0 with a 95% confidence interval from -4.5 to -3.5.
Massachusetts7
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 34.5 with a 95% confidence interval from 33.9 to 35.1 and 2,843 average annual cases over 2014-2018.
- CI*Rank⋔ : 44 (38, 47)
- Recent Trend : The trend is falling
because the trend is -3.7 with a 95% confidence interval from -6.1 to -1.3.
New Hampshire6
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 36.2 with a 95% confidence interval from 34.9 to 37.6 and 620 average annual cases over 2014-2018.
- CI*Rank⋔ : 34 (24, 44)
- Recent Trend : The trend is falling
because the trend is -3.1 with a 95% confidence interval from -3.8 to -2.4.
Pennsylvania6
- Met Healthy People Objective of 39.9? : No
- Rate : The incidence rate is 40.1 with a 95% confidence interval from 39.7 to 40.5 and 6,676 average annual cases over 2014-2018.
- CI*Rank⋔ : 20 (15, 23)
- Recent Trend : The trend is falling
because the trend is -2.9 with a 95% confidence interval from -5.3 to -0.5.
District of Columbia6
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 37.9 with a 95% confidence interval from 35.8 to 40.1 and 251 average annual cases over 2014-2018.
- CI*Rank⋔ : 24 (13, 42)
- Recent Trend : The trend is falling
because the trend is -2.8 with a 95% confidence interval from -4.0 to -1.6.
Indiana6
- Met Healthy People Objective of 39.9? : No
- Rate : The incidence rate is 41.7 with a 95% confidence interval from 41.1 to 42.4 and 3,207 average annual cases over 2014-2018.
- CI*Rank⋔ : 11 (7, 16)
- Recent Trend : The trend is falling
because the trend is -2.8 with a 95% confidence interval from -4.9 to -0.7.
Vermont6
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 34.9 with a 95% confidence interval from 33.0 to 36.8 and 289 average annual cases over 2014-2018.
- CI*Rank⋔ : 42 (26, 50)
- Recent Trend : The trend is falling
because the trend is -2.8 with a 95% confidence interval from -3.3 to -2.2.
Wyoming6
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 32.9 with a 95% confidence interval from 30.9 to 34.9 and 219 average annual cases over 2014-2018.
- CI*Rank⋔ : 48 (36, 50)
- Recent Trend : The trend is falling
because the trend is -2.7 with a 95% confidence interval from -3.5 to -1.8.
Oregon6
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 34.0 with a 95% confidence interval from 33.3 to 34.8 and 1,695 average annual cases over 2014-2018.
- CI*Rank⋔ : 45 (39, 48)
- Recent Trend : The trend is falling
because the trend is -2.6 with a 95% confidence interval from -2.9 to -2.4.
Puerto Rico6
- Met Healthy People Objective of 39.9? : No
- Rate : The incidence rate is 40.6 with a 95% confidence interval from 39.7 to 41.4 and 1,848 average annual cases over 2014-2018.
- CI*Rank⋔ : N/A
- Recent Trend : The trend is stable
because the trend is -2.6 with a 95% confidence interval from -5.6 to 0.4.
South Dakota6
- Met Healthy People Objective of 39.9? : No
- Rate : The incidence rate is 41.3 with a 95% confidence interval from 39.5 to 43.2 and 423 average annual cases over 2014-2018.
- CI*Rank⋔ : 12 (5, 23)
- Recent Trend : The trend is falling
because the trend is -2.5 with a 95% confidence interval from -3.2 to -1.7.
Utah7
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 29.3 with a 95% confidence interval from 28.3 to 30.2 and 764 average annual cases over 2014-2018.
- CI*Rank⋔ : 51 (51, 51)
- Recent Trend : The trend is falling
because the trend is -2.5 with a 95% confidence interval from -3.0 to -2.0.
Alabama6
- Met Healthy People Objective of 39.9? : No
- Rate : The incidence rate is 42.8 with a 95% confidence interval from 42.1 to 43.6 and 2,522 average annual cases over 2014-2018.
- CI*Rank⋔ : 8 (5, 12)
- Recent Trend : The trend is falling
because the trend is -2.4 with a 95% confidence interval from -4.3 to -0.4.
Arizona6
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 32.3 with a 95% confidence interval from 31.7 to 32.9 and 2,680 average annual cases over 2014-2018.
- CI*Rank⋔ : 50 (47, 50)
- Recent Trend : The trend is falling
because the trend is -2.3 with a 95% confidence interval from -2.6 to -2.1.
Missouri6
- Met Healthy People Objective of 39.9? : No
- Rate : The incidence rate is 40.1 with a 95% confidence interval from 39.5 to 40.8 and 2,960 average annual cases over 2014-2018.
- CI*Rank⋔ : 19 (13, 23)
- Recent Trend : The trend is falling
because the trend is -2.3 with a 95% confidence interval from -2.6 to -2.1.
North Dakota6
- Met Healthy People Objective of 39.9? : No
- Rate : The incidence rate is 41.0 with a 95% confidence interval from 39.1 to 43.1 and 346 average annual cases over 2014-2018.
- CI*Rank⋔ : 15 (5, 24)
- Recent Trend : The trend is falling
because the trend is -2.3 with a 95% confidence interval from -3.0 to -1.7.
Washington5
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 35.1 with a 95% confidence interval from 34.5 to 35.7 and 2,885 average annual cases over 2014-2018.
- CI*Rank⋔ : 39 (35, 46)
- Recent Trend : The trend is falling
because the trend is -2.3 with a 95% confidence interval from -2.7 to -2.0.
Wisconsin6
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 36.5 with a 95% confidence interval from 35.8 to 37.1 and 2,563 average annual cases over 2014-2018.
- CI*Rank⋔ : 32 (27, 38)
- Recent Trend : The trend is falling
because the trend is -2.2 with a 95% confidence interval from -2.6 to -1.8.
Kansas6
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 39.8 with a 95% confidence interval from 38.8 to 40.8 and 1,318 average annual cases over 2014-2018.
- CI*Rank⋔ : 22 (13, 24)
- Recent Trend : The trend is falling
because the trend is -2.1 with a 95% confidence interval from -2.5 to -1.7.
Montana6
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 37.4 with a 95% confidence interval from 35.9 to 38.9 and 498 average annual cases over 2014-2018.
- CI*Rank⋔ : 29 (22, 40)
- Recent Trend : The trend is falling
because the trend is -2.1 with a 95% confidence interval from -2.6 to -1.7.
New Mexico7
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 33.4 with a 95% confidence interval from 32.3 to 34.4 and 838 average annual cases over 2014-2018.
- CI*Rank⋔ : 47 (41, 50)
- Recent Trend : The trend is falling
because the trend is -2.1 with a 95% confidence interval from -2.7 to -1.6.
Alaska6
- Met Healthy People Objective of 39.9? : No
- Rate : The incidence rate is 42.3 with a 95% confidence interval from 40.0 to 44.7 and 292 average annual cases over 2014-2018.
- CI*Rank⋔ : 9 (3, 23)
- Recent Trend : The trend is falling
because the trend is -2.0 with a 95% confidence interval from -2.7 to -1.3.
Georgia7
- Met Healthy People Objective of 39.9? : No
- Rate : The incidence rate is 40.9 with a 95% confidence interval from 40.4 to 41.5 and 4,499 average annual cases over 2014-2018.
- CI*Rank⋔ : 16 (10, 20)
- Recent Trend : The trend is stable
because the trend is -2.0 with a 95% confidence interval from -4.2 to 0.2.
Delaware6
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 37.8 with a 95% confidence interval from 36.3 to 39.5 and 455 average annual cases over 2014-2018.
- CI*Rank⋔ : 25 (18, 38)
- Recent Trend : The trend is stable
because the trend is -1.9 with a 95% confidence interval from -5.8 to 2.1.
Louisiana7
- Met Healthy People Objective of 39.9? : No
- Rate : The incidence rate is 44.9 with a 95% confidence interval from 44.1 to 45.8 and 2,390 average annual cases over 2014-2018.
- CI*Rank⋔ : 4 (3, 6)
- Recent Trend : The trend is falling
because the trend is -1.9 with a 95% confidence interval from -2.1 to -1.7.
California7
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 34.8 with a 95% confidence interval from 34.6 to 35.1 and 14,763 average annual cases over 2014-2018.
- CI*Rank⋔ : 43 (38, 45)
- Recent Trend : The trend is falling
because the trend is -1.8 with a 95% confidence interval from -2.3 to -1.2.
Florida6
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 36.2 with a 95% confidence interval from 35.9 to 36.5 and 10,299 average annual cases over 2014-2018.
- CI*Rank⋔ : 36 (30, 38)
- Recent Trend : The trend is falling
because the trend is -1.8 with a 95% confidence interval from -2.4 to -1.1.
Idaho7
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 35.3 with a 95% confidence interval from 34.1 to 36.6 and 666 average annual cases over 2014-2018.
- CI*Rank⋔ : 38 (28, 47)
- Recent Trend : The trend is falling
because the trend is -1.8 with a 95% confidence interval from -2.1 to -1.5.
Kentucky7
- Met Healthy People Objective of 39.9? : No
- Rate : The incidence rate is 48.0 with a 95% confidence interval from 47.2 to 48.9 and 2,540 average annual cases over 2014-2018.
- CI*Rank⋔ : 2 (1, 3)
- Recent Trend : The trend is falling
because the trend is -1.8 with a 95% confidence interval from -1.9 to -1.6.
New Jersey7
- Met Healthy People Objective of 39.9? : No
- Rate : The incidence rate is 40.1 with a 95% confidence interval from 39.5 to 40.6 and 4,325 average annual cases over 2014-2018.
- CI*Rank⋔ : 21 (14, 23)
- Recent Trend : The trend is falling
because the trend is -1.8 with a 95% confidence interval from -2.4 to -1.1.
Oklahoma6
- Met Healthy People Objective of 39.9? : No
- Rate : The incidence rate is 41.2 with a 95% confidence interval from 40.3 to 42.0 and 1,839 average annual cases over 2014-2018.
- CI*Rank⋔ : 14 (8, 21)
- Recent Trend : The trend is falling
because the trend is -1.8 with a 95% confidence interval from -2.1 to -1.5.
Hawaii7
- Met Healthy People Objective of 39.9? : No
- Rate : The incidence rate is 40.1 with a 95% confidence interval from 38.8 to 41.5 and 710 average annual cases over 2014-2018.
- CI*Rank⋔ : 18 (9, 25)
- Recent Trend : The trend is falling
because the trend is -1.6 with a 95% confidence interval from -1.8 to -1.4.
Iowa7
- Met Healthy People Objective of 39.9? : No
- Rate : The incidence rate is 43.2 with a 95% confidence interval from 42.3 to 44.2 and 1,653 average annual cases over 2014-2018.
- CI*Rank⋔ : 6 (4, 11)
- Recent Trend : The trend is falling
because the trend is -1.6 with a 95% confidence interval from -2.5 to -0.7.
Ohio6
- Met Healthy People Objective of 39.9? : No
- Rate : The incidence rate is 41.3 with a 95% confidence interval from 40.8 to 41.8 and 5,914 average annual cases over 2014-2018.
- CI*Rank⋔ : 13 (9, 17)
- Recent Trend : The trend is stable
because the trend is -1.6 with a 95% confidence interval from -4.0 to 0.9.
Colorado6
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 32.5 with a 95% confidence interval from 31.9 to 33.2 and 1,912 average annual cases over 2014-2018.
- CI*Rank⋔ : 49 (46, 50)
- Recent Trend : The trend is falling
because the trend is -1.5 with a 95% confidence interval from -2.0 to -0.9.
Maine6
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 36.2 with a 95% confidence interval from 35.0 to 37.5 and 673 average annual cases over 2014-2018.
- CI*Rank⋔ : 35 (24, 44)
- Recent Trend : The trend is falling
because the trend is -1.5 with a 95% confidence interval from -3.0 to -0.1.
New York7
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 38.1 with a 95% confidence interval from 37.8 to 38.5 and 8,979 average annual cases over 2014-2018.
- CI*Rank⋔ : 23 (22, 28)
- Recent Trend : The trend is falling
because the trend is -1.5 with a 95% confidence interval from -2.0 to -0.9.
Arkansas6
- Met Healthy People Objective of 39.9? : No
- Rate : The incidence rate is 44.0 with a 95% confidence interval from 43.0 to 45.0 and 1,587 average annual cases over 2014-2018.
- CI*Rank⋔ : 5 (3, 9)
- Recent Trend : The trend is stable
because the trend is -1.4 with a 95% confidence interval from -3.9 to 1.3.
Illinois6
- Met Healthy People Objective of 39.9? : No
- Rate : The incidence rate is 42.1 with a 95% confidence interval from 41.6 to 42.5 and 6,243 average annual cases over 2014-2018.
- CI*Rank⋔ : 10 (7, 14)
- Recent Trend : The trend is falling
because the trend is -1.4 with a 95% confidence interval from -2.6 to -0.2.
Virginia6
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 35.0 with a 95% confidence interval from 34.4 to 35.5 and 3,357 average annual cases over 2014-2018.
- CI*Rank⋔ : 41 (36, 46)
- Recent Trend : The trend is falling
because the trend is -1.4 with a 95% confidence interval from -2.1 to -0.7.
South Carolina6
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 37.6 with a 95% confidence interval from 36.8 to 38.3 and 2,275 average annual cases over 2014-2018.
- CI*Rank⋔ : 27 (23, 33)
- Recent Trend : The trend is stable
because the trend is -1.3 with a 95% confidence interval from -2.8 to 0.1.
Connecticut7
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 35.0 with a 95% confidence interval from 34.2 to 35.8 and 1,580 average annual cases over 2014-2018.
- CI*Rank⋔ : 40 (34, 46)
- Recent Trend : The trend is stable
because the trend is -1.1 with a 95% confidence interval from -4.1 to 2.0.
Maryland6
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 36.4 with a 95% confidence interval from 35.8 to 37.1 and 2,518 average annual cases over 2014-2018.
- CI*Rank⋔ : 33 (27, 39)
- Recent Trend : The trend is stable
because the trend is -1.0 with a 95% confidence interval from -2.0 to 0.0.
Michigan5
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 37.2 with a 95% confidence interval from 36.7 to 37.7 and 4,547 average annual cases over 2014-2018.
- CI*Rank⋔ : 30 (24, 34)
- Recent Trend : The trend is stable
because the trend is -1.0 with a 95% confidence interval from -2.3 to 0.2.
North Carolina6
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 36.8 with a 95% confidence interval from 36.3 to 37.3 and 4,391 average annual cases over 2014-2018.
- CI*Rank⋔ : 31 (27, 37)
- Recent Trend : The trend is falling
because the trend is -1.0 with a 95% confidence interval from -1.6 to -0.4.
Minnesota6
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 37.5 with a 95% confidence interval from 36.8 to 38.2 and 2,401 average annual cases over 2014-2018.
- CI*Rank⋔ : 28 (23, 34)
- Recent Trend : The trend is stable
because the trend is -0.9 with a 95% confidence interval from -2.1 to 0.4.
Tennessee6
- Met Healthy People Objective of 39.9? : No
- Rate : The incidence rate is 40.4 with a 95% confidence interval from 39.8 to 41.1 and 3,198 average annual cases over 2014-2018.
- CI*Rank⋔ : 17 (12, 22)
- Recent Trend : The trend is stable
because the trend is -0.6 with a 95% confidence interval from -1.7 to 0.6.
West Virginia6
- Met Healthy People Objective of 39.9? : No
- Rate : The incidence rate is 46.1 with a 95% confidence interval from 44.9 to 47.4 and 1,135 average annual cases over 2014-2018.
- CI*Rank⋔ : 3 (1, 5)
- Recent Trend : The trend is stable
because the trend is -0.5 with a 95% confidence interval from -1.3 to 0.3.
Nebraska6
- Met Healthy People Objective of 39.9? : No
- Rate : The incidence rate is 42.9 with a 95% confidence interval from 41.6 to 44.1 and 937 average annual cases over 2014-2018.
- CI*Rank⋔ : 7 (4, 15)
- Recent Trend : The trend is stable
because the trend is -0.4 with a 95% confidence interval from -1.9 to 1.0.
Texas6
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 37.8 with a 95% confidence interval from 37.5 to 38.2 and 10,461 average annual cases over 2014-2018.
- CI*Rank⋔ : 26 (23, 29)
- Recent Trend : The trend is stable
because the trend is -0.3 with a 95% confidence interval from -0.9 to 0.3.
Mississippi6
- Met Healthy People Objective of 39.9? : No
- Rate : The incidence rate is 48.2 with a 95% confidence interval from 47.1 to 49.2 and 1,679 average annual cases over 2014-2018.
- CI*Rank⋔ : 1 (1, 3)
- Recent Trend : * Data has been suppressed to ensure confidentiality and stability of rate estimates. Counts are suppressed if fewer than 16 records were reported in a specific area-sex-race category. If an average count of 3 is shown, the total number of cases for the time period is 16 or more which exceeds suppression threshold (but is rounded to 3).
Nevada6
- Met Healthy People Objective of 39.9? : Yes
- Rate : The incidence rate is 35.6 with a 95% confidence interval from 34.6 to 36.7 and 938 average annual cases over 2014-2018.
- CI*Rank⋔ : 37 (29, 45)
- Recent Trend : * Data has been suppressed to ensure confidentiality and stability of rate estimates. Counts are suppressed if fewer than 16 records were reported in a specific area-sex-race category. If an average count of 3 is shown, the total number of cases for the time period is 16 or more which exceeds suppression threshold (but is rounded to 3).
Notes:
Created by statecancerprofiles.cancer.gov on 05/22/2022 7:53 am.
State Cancer Registries may provide more current or more local data.
Trend
Rising when 95% confidence interval of average annual percent change is above 0.
Stable when 95% confidence interval of average annual percent change includes 0.
Falling when 95% confidence interval of average annual percent change is below 0.
Rising when 95% confidence interval of average annual percent change is above 0.
Stable when 95% confidence interval of average annual percent change includes 0.
Falling when 95% confidence interval of average annual percent change is below 0.
⋔ Results presented with the CI*Rank statistics help show the usefulness of ranks. For example, ranks for relatively rare diseases or less populated areas may be essentially meaningless because of their large variability, but ranks for more common diseases in densely populated regions can be very useful. More information about methodology can be found on the CI*Rank website.
† Incidence rates (cases per 100,000 population per year) are age-adjusted to the 2000 US standard population (19 age groups: <1, 1-4, 5-9, ... , 80-84, 85+). Rates are for invasive cancer only (except for bladder cancer which is invasive and in situ) or unless otherwise specified. Rates calculated using SEER*Stat. Population counts for denominators are based on Census populations as modified by NCI. The 1969-2018 US Population Data File is used for SEER and NPCR incidence rates.
‡ Incidence data come from different sources. Due to different years of data availability, most of the trends are AAPCs based on APCs but some are APCs calculated in SEER*Stat. Please refer to the source for each area for additional information.
Rates and trends are computed using different standards for malignancy. For more information see malignant.html.
^ All Stages refers to any stage in the Surveillance, Epidemiology, and End Results (SEER) summary stage.
Healthy People 2020 Objectives provided by the Centers for Disease Control and Prevention.
* Data has been suppressed to ensure confidentiality and stability of rate estimates. Counts are suppressed if fewer than 16 records were reported in a specific area-sex-race category. If an average count of 3 is shown, the total number of cases for the time period is 16 or more which exceeds suppression threshold (but is rounded to 3).
1 Source: National Program of Cancer Registries and Surveillance, Epidemiology, and End Results SEER*Stat Database (2001-2018) - United States Department of Health and Human Services, Centers for Disease Control and Prevention and National Cancer Institute. Based on the 2020 submission.
5 Source: National Program of Cancer Registries and Surveillance, Epidemiology, and End Results SEER*Stat Database (2001-2018) - United States Department of Health and Human Services, Centers for Disease Control and Prevention and National Cancer Institute. Based on the 2020 submission.
6 Source: National Program of Cancer Registries SEER*Stat Database (2001-2018) - United States Department of Health and Human Services, Centers for Disease Control and Prevention (based on the 2020 submission).
7 Source: SEER November 2020 submission.
8 Source: Incidence data provided by the SEER Program. AAPCs are calculated by the Joinpoint Regression Program and are based on APCs. Data are age-adjusted to the 2000 US standard population (19 age groups: <1, 1-4, 5-9, ... , 80-84,85+). Rates are for invasive cancer only (except for bladder cancer which is invasive and in situ) or unless otherwise specified. Population counts for denominators are based on Census populations as modifed by NCI. The 1969-2018 US Population Data File is used with SEER November 2020 data.
Interpret Rankings provides insight into interpreting cancer incidence statistics. When the population size for a denominator is small, the rates may be unstable. A rate is unstable when a small change in the numerator (e.g., only one or two additional cases) has a dramatic effect on the calculated rate.
Data for United States does not include Puerto Rico.