Table 6B. Chlamydia — Reported Cases and Rates of Reported Cases Among Women Aged 15–24 Years by Age, United States, 2017–2021
| Ages | Cases | Rates per 100,000 Population | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2017 | 2018 | 2019 | 2020 | 2021 | |
| 15 | 20,247 | 19,518 | 20,352 | 17,168 | 15,886 | 1,004.4 | 961.7 | 994.8 | 818.5 | 746.7 |
| 16 | 40,681 | 40,001 | 40,135 | 33,901 | 32,012 | 1,968.3 | 1,976.3 | 1,973.0 | 1,600.8 | 1,520.1 |
| 17 | 65,496 | 66,329 | 65,210 | 55,136 | 53,315 | 3,120.8 | 3,194.3 | 3,212.5 | 2,640.1 | 2,516.6 |
| 18 | 98,907 | 101,783 | 102,336 | 87,113 | 84,428 | 4,774.1 | 4,824.0 | 4,911.9 | 4,149.5 | 4,021.3 |
| 19 | 111,959 | 114,004 | 116,097 | 101,306 | 98,665 | 5,387.4 | 5,474.9 | 5,487.5 | 4,749.6 | 4,720.2 |
| 20 | 107,397 | 110,939 | 111,609 | 99,860 | 98,541 | 5,140.2 | 5,315.2 | 5,349.0 | 4,728.3 | 4,631.5 |
| 21 | 100,160 | 102,127 | 103,394 | 93,215 | 95,075 | 4,759.7 | 4,865.7 | 4,944.2 | 4,441.8 | 4,466.6 |
| 22 | 86,678 | 86,274 | 86,633 | 78,669 | 80,655 | 4,030.4 | 4,078.8 | 4,118.6 | 3,767.3 | 3,846.4 |
| 23 | 75,046 | 73,729 | 73,497 | 66,368 | 68,341 | 3,416.6 | 3,409.6 | 3,467.0 | 3,160.2 | 3,262.2 |
| 24 | 64,769 | 64,663 | 63,434 | 56,037 | 58,090 | 2,906.1 | 2,928.1 | 2,927.2 | 2,640.1 | 2,762.6 |
| Total | 771,340 | 779,367 | 782,697 | 688,773 | 685,008 | 3,655.5 | 3,712.3 | 3,749.1 | 3,270.9 | 3,247.6 |
| NOTE: Cases reported with unknown sex are not included in this table. The COVID-19 pandemic has introduced uncertainty and difficulty in interpreting STD data collected during 2020 and 2021. See Impact of COVID-19 on STDs for more information. | ||||||||||
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