| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 9 |
6.6%
|
| 1 | Never | 33 |
24.3%
|
| 2 | Once a week | 58 |
42.6%
|
| 3 | Between 2 and 4 times a week | 17 |
12.5%
|
| 4 | Daily | 18 |
13.2%
|
| 5 | More than once a day | 1 |
0.7%
|
| Sysmiss | 241 |