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Demographic Characteristics
| All Intervals (N = 152,455) | |
|---|---|
| Age, years, mean (SD) | 18.5 (13.6) |
| Male, n (%) | 69,286 (45.4) |
| Urban population density, n (%) | 128,714 (84.4) |
| Race, n (%) | |
| Black | 111,839 (73.4) |
| Unknown | 35,890 (23.5) |
| White | 2,506 (1.6) |
| Hispanic | 1,459 (1.0) |
| Other | 761 (0.5) |
SD = standard deviation.
