By Column: Everything | Demographics | Sexual History | Attitudes | Relationships | Dating | Hookups
Alphabetically: Everything | Demographics | Sexual History | Attitudes | Relationships | Dating | Hookups
year
| Variable Summary | Undergrad | Freshman | Sophomore | Junior | Senior |
| Sexually active students: | Undergrad | Freshman | Sophomore | Junior | Senior |
| Casual-sexually active students: | Undergrad | Freshman | Sophomore | Junior | Senior |
| hookups (year or hookup__year) | ||||||
| All Rs | Female | Male | ||||
| Mean (Std. Dev.) | 2007.58 (1.64) | 2007.59 (1.66) | 2007.56 (1.60) | |||
| 1981 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 1984 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 1985 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 1986 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 1987 | 1 | 0.01% | 1 | 0.02% | 0 | 0.00% |
| 1988 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 1990 | 1 | 0.01% | 1 | 0.02% | 0 | 0.00% |
| 1991 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 1992 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 1993 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 1995 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 1997 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 1998 | 1 | 0.01% | 1 | 0.02% | 0 | 0.00% |
| 1999 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 2000 | 1 | 0.01% | 1 | 0.02% | 0 | 0.00% |
| 2001 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 2002 | 7 | 0.07% | 6 | 0.09% | 1 | 0.03% |
| 2003 | 30 | 0.32% | 21 | 0.32% | 9 | 0.31% |
| 2004 | 135 | 1.42% | 117 | 1.79% | 18 | 0.62% |
| 2005 | 748 | 7.88% | 503 | 7.68% | 244 | 8.35% |
| 2006 | 1563 | 16.46% | 1048 | 16.00% | 512 | 17.52% |
| 2007 | 2182 | 22.98% | 1453 | 22.18% | 725 | 24.81% |
| 2008 | 2061 | 21.71% | 1462 | 22.31% | 597 | 20.43% |
| 2009 | 1383 | 14.57% | 999 | 15.25% | 380 | 13.00% |
| 2010 | 1168 | 12.30% | 801 | 12.23% | 362 | 12.39% |
| 2011 | 214 | 2.25% | 138 | 2.11% | 74 | 2.53% |
| Missing |
7
(0.07%) |
– |
5
(0.08%) |
– |
2
(0.07%) |
– |
| Total | 9502 | 100% | 6557 | 100% | 2924 | 100% |
| dates (year or date__year) | ||||||
| All Rs | Female | Male | ||||
| Mean (Std. Dev.) | 2007.53 (1.66) | 2007.51 (1.67) | 2007.55 (1.62) | |||
| 1980 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 1981 | 1 | 0.01% | 1 | 0.02% | 0 | 0.00% |
| 1982 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 1985 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 1987 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 1989 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 1990 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 1991 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 1992 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 1993 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 1994 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 1995 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 1996 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 1997 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 1998 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 1999 | 1 | 0.01% | 1 | 0.02% | 0 | 0.00% |
| 2000 | 3 | 0.03% | 2 | 0.03% | 1 | 0.04% |
| 2001 | 1 | 0.01% | 1 | 0.02% | 0 | 0.00% |
| 2002 | 9 | 0.10% | 8 | 0.13% | 1 | 0.04% |
| 2003 | 42 | 0.49% | 31 | 0.52% | 11 | 0.42% |
| 2004 | 148 | 1.72% | 114 | 1.91% | 34 | 1.29% |
| 2005 | 707 | 8.20% | 504 | 8.46% | 201 | 7.62% |
| 2006 | 1430 | 16.60% | 961 | 16.13% | 465 | 17.63% |
| 2007 | 1974 | 22.91% | 1321 | 22.17% | 649 | 24.61% |
| 2008 | 1841 | 21.36% | 1314 | 22.05% | 525 | 19.91% |
| 2009 | 1275 | 14.80% | 919 | 15.42% | 353 | 13.39% |
| 2010 | 1031 | 11.96% | 687 | 11.53% | 338 | 12.82% |
| 2011 | 154 | 1.79% | 94 | 1.58% | 59 | 2.24% |
| Missing |
71
(0.82%) |
– |
41
(0.68%) |
– |
30
(1.12%) |
– |
| Total | 8688 | 100% | 5999 | 100% | 2667 | 100% |
These tables reflect only undergraduates attending 4-year colleges who are of normative age -- 18, 19, 20, 21, or 22, +/- 1, for freshman, sophomores, juniors, and seniors, respectively.