| Survey | Sample frame | N (women) |
|---|---|---|
| 1973 | Ever-married women and single women with children in household, age 15–44; black women oversampled | 9,797 |
| 1976 | Ever-married women and single women with children in household, age 15–44; black women oversampled | 8,611 |
| 1982 | Women, age 15–44; black and teenage women oversampled | 7,969 |
| 1988 | Women, age 15–44; black women oversampled | 8,450 |
| 1995 | Women, age 15–44; black and Hispanic women oversampled | 10,847 |
| 2002 | Women, age 15–44; black, Hispanic, and teenage women oversampled | 7,643 |
| 2006–10a | Women, age 15–44; black, Hispanic, and teenage women oversampled | 12,279 |
| 2011—15a | Women, age 15–44; black, Hispanic, and teenage women oversampled | 11,300 |
a
Data collected continuously starting in 2006.