# of joints |
consumption days per year |
|||
per consumption day |
12 to 30 |
31 to 54 |
55 to 234 |
235 to 365 |
1
|
69.55%
|
59.60%
|
41.14%
|
34.29%
|
2
|
19.77%
|
25.10%
|
26.95%
|
25.01%
|
3
|
5.75%
|
4.96%
|
10.64%
|
20.96%
|
4
|
1.20%
|
3.12%
|
4.61%
|
3.74%
|
5
|
2.82%
|
3.57%
|
3.94%
|
4.74%
|
6 or more
|
0.91%
|
3.64%
|
12.72%
|
11.27%
|
Source: National Household Survey on Drug Abuse, 1991 – 1993. Substance Abuse and Mental Health Services Administration (SAMSHA).