| All races3 |
| 1950 | 14.1 | 12.6 | 21.3 | 19.9 | 13.3 | 7.2 | 2.0 |
| 1960 | 21.6 | 15.3 | 39.7 | 45.1 | 27.8 | 14.1 | 3.6 |
| 1970 | 26.4 | 22.4 | 38.4 | 37.0 | 27.1 | 13.6 | 3.5 |
| 1980 | 29.4 | 27.6 | 40.9 | 34.0 | 21.1 | 9.7 | 2.6 |
| 1990 | 43.8 | 42.5 | 65.1 | 56.0 | 37.6 | 17.3 | 3.6 |
| 1996 | 43.8 | 42.2 | 68.9 | 54.5 | 40.2 | 19.9 | 4.8 |
| 1999 | 43.3 | 39.7 | 70.8 | 56.9 | 38.1 | 19.0 | 4.6 |
| 2000 | 44.1 | 39.0 | 72.2 | 58.5 | 39.3 | 19.7 | 5.0 |
| 2001 | 43.8 | 37.0 | 71.3 | 59.5 | 40.4 | 20.4 | 5.3 |
| 2002 | 43.7 | 35.4 | 70.5 | 61.5 | 40.8 | 20.8 | 5.4 |
| White4 |
| 1950 | 6.1 | 5.1 | 10.0 | 8.7 | 5.9 | — | — |
| 1960 | 9.2 | 6.6 | 18.2 | 18.2 | 10.8 | — | — |
| 1970 | 13.9 | 10.9 | 22.5 | 21.1 | 14.2 | 7.6 | 2.0 |
| 1980 | 18.1 | 16.5 | 25.1 | 21.5 | 14.1 | 7.1 | 1.8 |
| 1990 | 32.9 | 30.6 | 48.2 | 43.0 | 29.9 | 14.5 | 3.2 |
| 1999 | 37.4 | 33.2 | 60.2 | 50.8 | 34.9 | 17.4 | 4.1 |
| 2000 | 38.2 | 32.7 | 61.7 | 52.9 | 35.9 | 17.9 | 4.5 |
| 2001 | 38.5 | 31.3 | 61.8 | 54.6 | 37.2 | 18.6 | 4.9 |
| 2002 | 38.9 | 30.4 | 61.6 | 56.8 | 38.3 | 19.4 | 5.0 |
| White, Non-Hispanic |
| 1990 | 24.4 | 25.0 | 36.4 | 30.3 | 20.5 | 6.1 | — |
| 1999 | 27.9 | 25.6 | 46.3 | 36.2 | 24.8 | 13.0 | 3.1 |
| 2000 | 28.0 | 24.7 | 47.0 | 36.9 | 24.8 | 12.9 | 3.3 |
| 2001 | 27.8 | 23.1 | 46.4 | 37.5 | 25.4 | 13.2 | 3.6 |
| 2002 | 27.8 | 22.1 | 46.1 | 38.5 | 26.0 | 13.5 | 3.7 |
| Black4 |
| 1970 | 95.5 | 96.9 | 131.5 | 100.9 | 71.8 | 32.9 | 10.4 |
| 1980 | 81.1 | 87.9 | 112.3 | 81.4 | 46.7 | 19.0 | 5.5 |
| 1990 | 90.5 | 106.0 | 144.8 | 105.3 | 61.5 | 25.5 | 5.1 |
| 1999 | 69.7 | 76.5 | 126.8 | 85.5 | 49.0 | 24.2 | 5.8 |
| 2000 | 70.5 | 75.0 | 129.0 | 85.9 | 50.2 | 25.4 | 6.3 |
| 2001 | 68.1 | 69.9 | 122.8 | 84.1 | 51.1 | 25.4 | 6.3 |
| 2002 | 66.2 | 64.8 | 119.2 | 85.9 | 49.9 | 24.9 | 6.3 |
| Hispanic5 |
| 1990 | 89.6 | 65.9 | 129.8 | 131.7 | 88.1 | 50.8 | 13.7 |
| 1999 | 84.9 | 68.6 | 126.1 | 119.6 | 84.2 | 42.4 | 11.2 |
| 2000 | 87.3 | 68.5 | 130.5 | 121.6 | 89.4 | 46.1 | 12.2 |
| 2001 | 87.8 | 67.1 | 132.3 | 120.7 | 91.4 | 49.7 | 12.2 |
| 2002 | 87.9 | 66.1 | 131.4 | 123.1 | 88.1 | 51.3 | 12.6 |
| — Not available. |
| 1Rates computed by relating births to unmarried females, regardless of age of mother, to unmarried females ages 15 to 44 years. |
| 2Rates computed by relating births to unmarried females ages 40 years and over to unmarried females ages 40 to 44 years.
|
| 3Includes race/ethnicity categories not separately shown. |
| 4Includes persons of Hispanic origin. |
| 5Includes all persons of Hispanic origin of any race. |
| NOTE: For years 1980 to 1999, data for states in which marital status was not reported have been inferred from other items on the birth certificate and included with data from the reporting states. For years prior to 1980, births to unmarried females are estimated for the United States based on data from areas in which marital status of mother was reported. |
| SOURCE: U.S. Department of Health and Human Services, National Center for Health Statistics, National Vital Statistics of the United States, 1997, Volume I, Natality; and National Vital Statistics Report, Vol. 49, nos. 1, 5; Vol. 50, no.10; Vol. 52, No. 10. |
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