| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 54 |
13.9%
|
| 1 | Never | 54 |
13.9%
|
| 2 | Once a week | 150 |
38.6%
|
| 3 | Between 2 and 4 times a week | 107 |
27.5%
|
| 4 | Daily | 23 |
5.9%
|
| 5 | More than once a day | 1 |
0.3%
|
| Sysmiss | 980 |