TABLE 1

Demographics of the Samples by Year of Data Release

Year
1994200620082010
n = 2906n = 1806n = 1037n = 1142
Age
 12–13771 (26.5)432 (23.9)232 (22.4)268 (23.5)
 14–15717 (24.7)439 (24.3)276 (26.6)289 (25.3)
 16–17763 (26.3)472 (26.1)275 (26.5)321 (28.1)
 18–19655 (22.5)463 (25.6)254 (24.5)264 (23.1)
Race
 White1020 (35.1)594 (32.9)279 (26.9)248 (21.7)
 African American982 (33.8)596 (33.0)249 (24.0)313 (27.4)
 Mexican American150 (5.2)153 (8.5)184 (17.7)204 (17.9)
 Other754 (25.9)463 (25.6)325 (31.3)377 (33.0)
Sex
 Male1535 (52.8)916 (50.7)490 (47.3)525 (46.0)
 Female1371 (47.2)890 (49.3)547 (52.7)617 (54.0)
  • Data are presented as n (%).