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.) | 2007.59 (1.64) | 2007.61 (1.64) | 2007.53 (1.62) | |||
| 1981 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 1984 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 1985 | 1 | 0.01% | 0 | 0.00% | 1 | 0.03% |
| 1986 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 1987 | 1 | 0.01% | 1 | 0.01% | 0 | 0.00% |
| 1988 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 1990 | 1 | 0.01% | 1 | 0.01% | 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 | 0.01% | 0 | 0.00% |
| 1999 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 2000 | 1 | 0.01% | 1 | 0.01% | 0 | 0.00% |
| 2001 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% |
| 2002 | 8 | 0.06% | 7 | 0.08% | 1 | 0.03% |
| 2003 | 35 | 0.28% | 25 | 0.29% | 10 | 0.26% |
| 2004 | 156 | 1.26% | 128 | 1.50% | 28 | 0.72% |
| 2005 | 960 | 7.73% | 638 | 7.50% | 320 | 8.25% |
| 2006 | 2068 | 16.65% | 1373 | 16.14% | 692 | 17.84% |
| 2007 | 2919 | 23.50% | 1917 | 22.53% | 994 | 25.63% |
| 2008 | 2652 | 21.35% | 1884 | 22.14% | 764 | 19.70% |
| 2009 | 1797 | 14.47% | 1284 | 15.09% | 506 | 13.05% |
| 2010 | 1549 | 12.47% | 1065 | 12.52% | 477 | 12.30% |
| 2011 | 271 | 2.18% | 184 | 2.16% | 85 | 2.19% |
| Missing |
7
(0.06%) |
– |
5
(0.06%) |
– |
2
(0.05%) |
– |
| Total | 12427 | 100% | 8514 | 100% | 3880 | 100% |
| dates (year or date__year) | ||||||
| All Rs | Female | Male | ||||
| Mean (Std. Dev.) | 2007.55 (1.70) | 2007.56 (1.68) | 2007.53 (1.73) | |||
| 1980 | 2 | 0.02% | 0 | 0.00% | 2 | 0.05% |
| 1981 | 1 | 0.01% | 1 | 0.01% | 0 | 0.00% |
| 1982 | 1 | 0.01% | 1 | 0.01% | 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 | 2 | 0.02% | 1 | 0.01% | 1 | 0.03% |
| 2000 | 5 | 0.04% | 4 | 0.05% | 1 | 0.03% |
| 2001 | 1 | 0.01% | 1 | 0.01% | 0 | 0.00% |
| 2002 | 10 | 0.08% | 8 | 0.10% | 2 | 0.05% |
| 2003 | 55 | 0.46% | 42 | 0.52% | 13 | 0.35% |
| 2004 | 182 | 1.53% | 134 | 1.65% | 48 | 1.30% |
| 2005 | 924 | 7.78% | 654 | 8.03% | 265 | 7.16% |
| 2006 | 1976 | 16.63% | 1305 | 16.03% | 665 | 17.96% |
| 2007 | 2748 | 23.13% | 1792 | 22.01% | 951 | 25.69% |
| 2008 | 2520 | 21.21% | 1813 | 22.27% | 704 | 19.02% |
| 2009 | 1756 | 14.78% | 1254 | 15.40% | 496 | 13.40% |
| 2010 | 1484 | 12.49% | 993 | 12.20% | 483 | 13.05% |
| 2011 | 213 | 1.79% | 139 | 1.71% | 71 | 1.92% |
| Missing |
88
(0.74%) |
– |
54
(0.66%) |
– |
34
(0.91%) |
– |
| Total | 11968 | 100% | 8196 | 100% | 3736 | 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.