TABLE 9. Population Denominators by Sex for Rate Calculations, United States and U.S. Territories, 2020 column labels in same order that data fields appears in each record below: Reporting Area Total Resident Population US Resident Population by Sex, Population (Female) US Resident Population by Sex, Population (Male) tab delimited data : United States 329,484,123 167,227,921 162,256,202 New England 14,847,468 7,604,537 7,242,931 Connecticut 3,557,006 1,822,086 1,734,920 Maine 1,350,141 688,840 661,301 Massachusetts 6,893,574 3,546,542 3,347,032 New Hampshire 1,366,275 689,281 676,994 Rhode Island 1,057,125 542,433 514,692 Vermont 623,347 315,355 307,992 Middle Atlantic 41,002,401 21,001,813 20,000,588 New Jersey 8,882,371 4,539,322 4,343,049 New York (excluding New York City) 11,083,563 5,630,370 5,453,193 New York City 8,253,213 4,315,909 3,937,304 Pennsylvania 12,783,254 6,516,212 6,267,042 East North Central 46,834,910 23,773,455 23,061,455 Illinois 12,587,530 6,402,224 6,185,306 Indiana 6,754,953 3,422,994 3,331,959 Michigan 9,966,555 5,058,742 4,907,813 Ohio 11,693,217 5,960,556 5,732,661 Wisconsin 5,832,655 2,928,939 2,903,716 West North Central 21,481,834 10,807,995 10,673,839 Iowa 3,163,561 1,587,866 1,575,695 Kansas 2,913,805 1,462,265 1,451,540 Minnesota 5,657,342 2,838,748 2,818,594 Missouri 6,151,548 3,133,825 3,017,723 Nebraska 1,937,552 969,739 967,813 North Dakota 765,309 373,494 391,815 South Dakota 892,717 442,058 450,659 South Atlantic 66,392,969 34,036,193 32,356,776 Delaware 986,809 510,069 476,740 District of Columbia 712,816 374,884 337,932 Florida 21,733,312 11,113,132 10,620,180 Georgia 10,710,017 5,508,468 5,201,549 Maryland 6,055,802 3,123,228 2,932,574 North Carolina 10,600,823 5,448,241 5,152,582 South Carolina 5,218,040 2,694,628 2,523,412 Virginia 8,590,563 4,363,032 4,227,531 West Virginia 1,784,787 900,511 884,276 East South Central 19,252,403 9,876,257 9,376,146 Alabama 4,921,532 2,544,566 2,376,966 Kentucky 4,477,251 2,271,906 2,205,345 Mississippi 2,966,786 1,530,971 1,435,815 Tennessee 6,886,834 3,528,814 3,358,020 West South Central 41,017,382 20,714,134 20,303,248 Arkansas 3,030,522 1,543,666 1,486,856 Louisiana 4,645,318 2,381,158 2,264,160 Oklahoma 3,980,783 2,009,602 1,971,181 Texas 29,360,759 14,779,708 14,581,051 Mountain 25,213,395 12,591,627 12,621,768 Arizona 7,421,401 3,735,475 3,685,926 Colorado 5,807,719 2,881,832 2,925,887 Idaho 1,826,913 910,789 916,124 Montana 1,080,577 536,476 544,101 Nevada 3,138,259 1,565,619 1,572,640 New Mexico 2,106,319 1,063,860 1,042,459 Utah 3,249,879 1,612,139 1,637,740 Wyoming 582,328 285,437 296,891 Pacific 53,441,361 26,821,910 26,619,451 Alaska 731,158 349,621 381,537 California 39,368,078 19,790,589 19,577,489 Hawaii 1,407,006 702,640 704,366 Oregon 4,241,507 2,139,046 2,102,461 Washington 7,693,612 3,840,014 3,853,598 U.S. Territories 3,564,432 1,867,841 1,696,411 American Samoa 47,392 23,760 23,632 Commonwealth of Northern Mariana Islands 51,851 24,331 27,520 Guam 168,489 81,578 86,731 Puerto Rico 3,190,410 1,682,515 1,507,895 U.S. Virgin Islands 106,290 55,657 50,633 Notes: These are annual cases of selected infectious national notifiable diseases from the National Notifiable Diseases Surveillance System (NNDSS). NNDSS data reported by the 50 states, New York City, the District of Columbia, and the U.S. territories are collated and published. Cases are reported by state health departments to CDC weekly. Because source datasets may be updated as additional information is received, statistics in publications based on that source data may differ from what is presented in these tables. Source datasets for the 2020 annual tables were officially closed on September 27, 2022. The list of national notifiable Infectious diseases and conditions for 2020 and their national surveillance case definitions are available by navigating to the https://ndc.services.cdc.gov/, Surveillance Case Definitions | CDC web page, selecting "2020" for the notifiable condition list year, checking "Infectious" conditions, and clicking "Get Notifiable List by Year". This list incorporates the Council of State and Territorial Epidemiologists (CSTE) position statements approved in 2019 by CSTE for national surveillance that were implemented in January 2020. Revised case definitions were implemented for the following conditions: plague, legionellosis, acute hepatitis C, spotted fever rickettsiosis, and pertussis. In addition, CSTE adopted the first coronavirus disease 2019 (COVID-19) national surveillance case definition on April 5, 2020, and they approved a revision to the COVID-19 national surveillance case definition, effective August 5, 2020. Publication criteria for the finalized 2020 data are available at https://wonder.cdc.gov/nndss/documents/2020_NNDSS_Publication_Criteria_03162022.pdf, https://wonder.cdc.gov/nndss/documents/2020_NNDSS_Publication_Criteria_03162022.pdf. See also https://www.cdc.gov/nndss/data-statistics/readers-guides/index.html, Guide to Interpreting Provisional and Finalized NNDSS Data. Population estimates for incidence rates are July 1st, 2020, estimates obtained from the National Center for Health Statistics (NCHS) postcensal estimates of the resident population of the United States for April 1, 2010, to July 1, 2020, by year, county, single year of age (range: 0 to 85 years), bridged-race (white, black or African American, American Indian or Alaska Native, Asian, or Pacific Islander), Hispanic ethnicity (not Hispanic or Latino, Hispanic or Latino), and sex (Vintage 2020), prepared under a collaborative arrangement with the U.S. Census Bureau. Population estimates for states released September 21, 2021, are available at https://www.cdc.gov/nchs/nvss/bridged_race/data_documentation.htm, https://www.cdc.gov/nchs/nvss/bridged_race/data_documentation.htm. Population estimates for territories are the 2020 mid-year estimates from the U.S. Census Bureau International Data Base, accessed on March 15, 2022, at https://www.census.gov/data-tools/demo/idb/#/country?YR_ANIM=2022, https://www.census.gov/data-tools/demo/idb/#/country?YR_ANIM=2022. The choice of population denominators for incidence is based on the availability of population data at the time of publication preparation. Annual tables for 2016 and later years are available on https://wonder.cdc.gov/nndss/nndss_annual_tables_menu.asp, CDC WONDER. Annual summary reports from 1993–2015 are available as published in the https://www.cdc.gov/mmwr/mmwr_nd/index.html, Morbidity and Mortality Weekly Report. NNDSS annual tables since 1952 are available at https://stacks.cdc.gov/nndss, CDC Stacks (once in CDC Stacks, select "Annual Reports" in the "Genre" box to the left). For most conditions, national incidence rates are calculated as the number of reported cases for each infectious disease or condition divided by the U.S. resident population for the specified demographic population or the total U.S. resident population, multiplied by 100,000. When a national notifiable infectious condition is associated with a specific age restriction, the same restriction was applied to the population in the denominator of the incidence rate calculation. In addition, population data from reporting jurisdictions in which the disease or condition was not reportable or not available were excluded from the denominator of the incidence rate calculations. Age restrictions in the numerator and denominator are applied for the following childhood conditions: Zika virus disease, congenital (age restriction in numerator and denominator is <1 year) Zika virus infection, congenital (age restriction in numerator and denominator is <1 year) Haemophilus influenzae, invasive disease <5 years (age restriction in numerator and denominator is <5 years) Invasive pneumococcal disease <5 years (age restriction in numerator and denominator is <5 years) Influenza associated pediatric mortality (age restriction in numerator and denominator is <18 years) Infant botulism (age restriction in numerator and denominator is <1 year) Congenital rubella syndrome (age restriction in numerator and denominator is <1 year) Perinatal hepatitis B infection (age restriction in numerator is ≤24 months, denominator is <24 months) Perinatal hepatitis C infection (age restriction in numerator is ≤36 months, denominator is <36 months). Data for congenital syphilis are aggregated by the infant's year of birth. The rate for congenital syphilis is based upon the number of reported cases per 100,000 live births, using natality data for 2020 (National Center for Health Statistics https://wonder.cdc.gov/natality.html, Natality 2020, as compiled from data provided by the Vital Statistics Cooperative Program). Congenital syphilis cases are usually assigned to the mother's state of residence at the time of delivery. The mother's race and ethnicity are used for race- and ethnicity-specific rates of congenital syphilis cases. Surveillance data reported by other CDC programs might vary from data reported in these tables because of differences in 1) the date used to aggregate the data, 2) the timing of reports, 3) the source of the data, 4) surveillance case definitions, and 5) policies regarding case jurisdiction (i.e., which jurisdiction should submit the case notification to CDC). The following reporting areas may have incomplete data, due to technical or programmatic challenges while reconciling data during the COVID-19 pandemic: California, Guam, and Minnesota. The following reporting areas may have incomplete data due to updates made to their data after the 2020 reconciliation period ended and there was not sufficient time before publication of the annual tables to confirm the updated counts: Idaho, Kansas, Maryland, Vermont, and Virgin Islands. Of the reporting areas that submitted 2020 aggregate COVID-19 data to CDC, three did not submit probable cases. New York (excluding New York City) and Utah did not collect probable cases. U.S. Virgin Islands collected probable cases, but did not report them to CDC. Disease data presented in the 2020 tables reflect impacts of the COVID-19 pandemic, such as changes in exposure-related behavior, healthcare-seeking behavior, disease reporting, and public health investigations. Suggested Citation: Centers for Disease Control and Prevention. National Notifiable Diseases Surveillance System, 2020 Annual Tables of Infectious Disease Data. Atlanta, GA. CDC Division of Health Informatics and Surveillance, 2023. Available at: https://www.cdc.gov/nndss/data-statistics/infectious-tables/index.html, https://www.cdc.gov/nndss/data-statistics/infectious-tables/index.html. Acknowledgment: CDC acknowledges the local, state, and territorial health departments that collected the data from a range of case ascertainment sources (e.g., healthcare providers, hospitals, laboratories) and reported these data to CDC's National Notifiable Diseases Surveillance System. https://www.cdc.gov/nndss/, National Notifiable Diseases Surveillance System Provided by https://wonder.cdc.gov, CDC WONDER