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 (1.47) | 2007.56 (1.47) | 2007.61 (1.48) | |||
| 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 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | 
| 1988 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | 
| 1990 | 1 | 0.04% | 1 | 0.06% | 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 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | 
| 1999 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | 
| 2000 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | 
| 2001 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | 
| 2002 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | 
| 2003 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | 
| 2004 | 1 | 0.04% | 1 | 0.06% | 0 | 0.00% | 
| 2005 | 154 | 6.69% | 95 | 6.10% | 59 | 7.96% | 
| 2006 | 355 | 15.42% | 248 | 15.92% | 107 | 14.44% | 
| 2007 | 683 | 29.67% | 467 | 29.97% | 215 | 29.01% | 
| 2008 | 503 | 21.85% | 352 | 22.59% | 151 | 20.38% | 
| 2009 | 324 | 14.07% | 215 | 13.80% | 109 | 14.71% | 
| 2010 | 255 | 11.08% | 164 | 10.53% | 89 | 12.01% | 
| 2011 | 26 | 1.13% | 15 | 0.96% | 11 | 1.48% | 
| Missing | 0 (0.00%) | – | 0 (0.00%) | – | 0 (0.00%) | – | 
| Total | 2302 | 100% | 1558 | 100% | 741 | 100% | 
| dates (year or date__year) | ||||||
| All Rs | Female | Male | ||||
| Mean (Std. Dev.) | 2007.57 (1.46) | 2007.56 (1.44) | 2007.60 (1.50) | |||
| 1980 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | 
| 1981 | 0 | 0.00% | 0 | 0.00% | 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 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | 
| 2000 | 1 | 0.06% | 0 | 0.00% | 1 | 0.19% | 
| 2001 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | 
| 2002 | 1 | 0.06% | 1 | 0.09% | 0 | 0.00% | 
| 2003 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | 
| 2004 | 3 | 0.18% | 3 | 0.26% | 0 | 0.00% | 
| 2005 | 107 | 6.34% | 69 | 6.02% | 38 | 7.05% | 
| 2006 | 279 | 16.53% | 198 | 17.26% | 81 | 15.03% | 
| 2007 | 493 | 29.21% | 330 | 28.77% | 162 | 30.06% | 
| 2008 | 358 | 21.21% | 253 | 22.06% | 105 | 19.48% | 
| 2009 | 236 | 13.98% | 157 | 13.69% | 79 | 14.66% | 
| 2010 | 190 | 11.26% | 123 | 10.72% | 66 | 12.24% | 
| 2011 | 20 | 1.18% | 13 | 1.13% | 7 | 1.30% | 
| Missing | 24 (1.40%) | – | 17 (1.46%) | – | 7 (1.28%) | – | 
| Total | 1712 | 100% | 1164 | 100% | 546 | 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.