| Value | Category | Cases | |
|---|---|---|---|
| -95 | Refused | 0 |
0%
|
| 0 | Never | 1350 |
67.8%
|
| 1 | Once | 289 |
14.5%
|
| 2 | From time to time | 261 |
13.1%
|
| 3 | Often | 59 |
3%
|
| r | 32 |
1.6%
|
|
| Sysmiss | 744 |