| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 44 |
9.4%
|
| 1 | Never | 113 |
24.2%
|
| 2 | Once a week | 181 |
38.8%
|
| 3 | Between 2 and 4 times a week | 90 |
19.3%
|
| 4 | Daily | 35 |
7.5%
|
| 5 | More than once a day | 3 |
0.6%
|
| Sysmiss | 871 |