| Value | Category | Cases | |
|---|---|---|---|
| 0 | 3 times or less per term | 24764 |
42.6%
|
| 1 | 2-3 times per month | 19209 |
33%
|
| 2 | Once or more per week | 14224 |
24.4%
|
| Sysmiss | 3199 |