| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 30 |
8.8%
|
| 1 | Never | 54 |
15.8%
|
| 2 | Once a week | 112 |
32.8%
|
| 3 | Between 2 and 4 times a week | 58 |
17%
|
| 4 | Daily | 86 |
25.2%
|
| 5 | More than once a day | 1 |
0.3%
|
| Sysmiss | 898 |