| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.8%
|
| 1 | Never | 0 |
0%
|
| 2 | Once a week | 30 |
23.1%
|
| 3 | Between 2 and 4 times a week | 23 |
17.7%
|
| 4 | Daily | 67 |
51.5%
|
| 5 | More than once a day | 9 |
6.9%
|
| Sysmiss | 230 |