| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 56 |
4.9%
|
| 1 | Light | 838 |
73.8%
|
| 2 | Moderate | 204 |
18%
|
| 3 | Heavy | 37 |
3.3%
|
| Sysmiss | 16889 |