| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.6%
|
| 1 | Never | 7 |
4.2%
|
| 2 | Once a week | 69 |
41.3%
|
| 3 | Between 2 and 4 times a week | 32 |
19.2%
|
| 4 | Daily | 56 |
33.5%
|
| 5 | More than once a day | 2 |
1.2%
|
| Sysmiss | 237 |