| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 50 |
8.4%
|
| 1 | Once a month or less | 38 |
6.4%
|
| 2 | Several times a month | 65 |
10.9%
|
| 3 | Several times a week | 151 |
25.3%
|
| 4 | Daily | 294 |
49.2%
|
| Sysmiss | 438 |