
| Advanced academic level |
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| Year | None | Year 2 or less |
Year 3 or higher |
Year 3 | Year 4 | Advanced Placement (AP) |
| 1982 | 1.04 | 0.82 | 0.78 | 0.51 | 0.34 | 0.19 |
| 1987 | 1.27 | 1.12 | 1.34 | 0.87 | 0.40 | 0.43 |
| 1990 | 1.13 | 1.04 | 1.17 | 0.73 | 0.44 | 0.51 |
| 1992 | 0.90 | 1.10 | 1.13 | 0.78 | 0.68 | 0.31 |
| 1994 | 0.89 | 1.04 | 1.17 | 0.82 | 0.76 | 0.39 |
| 1998 | 0.89 | 1.20 | 1.40 | 1.06 | 0.58 | 0.50 |
| 2000 | 0.90 | 1.28 | 1.33 | 0.95 | 0.46 | 0.77 |
| 2004 | 0.64 | 0.90 | 1.05 | 0.66 | 0.48 | 0.39 |
| 2004 | 0.60 | 0.90 | 1.05 | 0.67 | 0.49 | 0.40 |
| SOURCE: U.S. Department of Education, National Center for Education Statistics, High School and Beyond Longitudinal Study of 1980 Sophomores, “First Follow-up” (HS&B:80/82); National Education Longitudinal Study of 1988, “High School Transcript Study” (NELS:88/92); Education Longitudinal Study of 2002 (ELS:2002/04), “High School Transcript Study”; and National Assessment of Educational Progress (NAEP), 1987, 1990, 1994, 1998, and 2000 High School Transcript Studies (HSTS). |
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