Table 1-3. YRBS: Prevalence of drinking in the past 30 days, by grade and sex, United States, 1991–2005.
| Sex and Year |
Grade |
| Total |
9th grade |
10th grade |
11th grade |
12th grade |
| Percent |
S.E. |
Percent |
S.E. |
Percent |
S.E. |
Percent |
S.E. |
Percent |
S.E. |
| Both Sexes |
| 2005 |
43.3 |
1.4 |
36.2 |
1.2 |
42.0 |
2.0 |
46.0 |
2.0 |
50.8 |
2.1 |
| 2003 |
44.9 |
1.2 |
36.2 |
1.4 |
43.5 |
1.7 |
47.0 |
2.1 |
55.9 |
1.6 |
| 2001 |
47.1 |
1.1 |
41.1 |
1.8 |
45.2 |
1.3 |
49.3 |
1.7 |
55.2 |
1.5 |
| 1999 |
50.0 |
1.3 |
40.6 |
2.2 |
49.7 |
1.9 |
50.9 |
2.0 |
61.7 |
2.2 |
| 1997 |
50.8 |
1.4 |
44.2 |
3.1 |
47.2 |
2.2 |
53.2 |
1.5 |
57.3 |
2.5 |
| 1995 |
51.6 |
1.2 |
45.6 |
1.9 |
49.5 |
2.4 |
53.7 |
1.5 |
56.5 |
1.6 |
| 1993 |
48.0 |
1.1 |
40.5 |
1.8 |
44.0 |
2.0 |
49.7 |
1.7 |
56.4 |
1.4 |
| 1991 |
50.8 |
1.7 |
40.9 |
2.6 |
47.8 |
1.7 |
54.5 |
2.0 |
59.9 |
2.2 |
| Male |
| 2005 |
43.8 |
1.4 |
36.3 |
1.7 |
41.4 |
2.3 |
47.8 |
2.1 |
52.0 |
2.1 |
| 2003 |
43.8 |
1.3 |
33.9 |
1.8 |
42.2 |
1.9 |
47.3 |
2.2 |
56.0 |
1.9 |
| 2001 |
49.2 |
1.4 |
42.2 |
2.3 |
46.9 |
1.6 |
53.6 |
2.2 |
56.6 |
1.6 |
| 1999 |
52.3 |
1.5 |
40.2 |
2.2 |
52.7 |
3.0 |
53.5 |
2.9 |
66.6 |
2.3 |
| 1997 |
53.3 |
1.2 |
44.7 |
3.8 |
48.7 |
2.0 |
57.8 |
1.5 |
60.2 |
2.9 |
| 1995 |
53.2 |
1.3 |
46.9 |
2.4 |
50.4 |
3.1 |
55.5 |
2.0 |
59.5 |
2.0 |
| 1993 |
50.1 |
1.2 |
40.2 |
2.2 |
44.1 |
2.2 |
53.6 |
2.2 |
60.5 |
2.2 |
| 1991 |
52.7 |
2.0 |
40.2 |
3.5 |
48.9 |
1.8 |
58.5 |
2.7 |
62.8 |
2.9 |
| Female |
| 2005 |
42.8 |
1.6 |
36.2 |
1.7 |
42.7 |
1.9 |
44.2 |
2.5 |
49.6 |
2.6 |
| 2003 |
45.8 |
1.3 |
38.5 |
1.7 |
44.9 |
1.8 |
46.8 |
2.4 |
55.5 |
2.0 |
| 2001 |
45.0 |
1.1 |
40.0 |
2.0 |
43.5 |
1.6 |
45.1 |
1.5 |
53.9 |
2.2 |
| 1999 |
47.7 |
1.4 |
41.0 |
3.0 |
46.8 |
1.6 |
48.3 |
2.6 |
56.9 |
3.0 |
| 1997 |
47.8 |
2.0 |
43.7 |
3.4 |
45.3 |
3.8 |
47.8 |
3.2 |
53.7 |
2.8 |
| 1995 |
49.9 |
1.8 |
43.7 |
2.9 |
48.6 |
2.7 |
51.8 |
2.6 |
53.6 |
2.6 |
| 1993 |
45.9 |
1.3 |
40.5 |
2.8 |
44.0 |
2.2 |
45.9 |
2.0 |
52.0 |
1.7 |
| 1991 |
48.8 |
1.6 |
41.5 |
2.6 |
46.6 |
2.4 |
50.2 |
2.1 |
56.9 |
2.0 |
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