| Value | Category | Cases | |
|---|---|---|---|
| -97 | NA | 0 |
0%
|
| -95 | Refuse | 0 |
0%
|
| 1 | Never | 32 |
1.6%
|
| 2 | From time to time | 594 |
30%
|
| 3 | Often | 1350 |
68.2%
|
| a | 4 |
0.2%
|
|
| Sysmiss | 755 |