| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 67 |
21.2%
|
| 1 | Never | 18 |
5.7%
|
| 2 | Once a week | 165 |
52.2%
|
| 3 | Between 2 and 4 times a week | 55 |
17.4%
|
| 4 | Daily | 9 |
2.8%
|
| 5 | More than once a day | 2 |
0.6%
|
| Sysmiss | 780 |