| Value | Category | Cases | |
|---|---|---|---|
| -97 | NA | 0 |
0%
|
| -95 | Refuse | 0 |
0%
|
| 1 | Never | 125 |
6.3%
|
| 2 | From time to time | 856 |
43.1%
|
| 3 | Often | 1004 |
50.5%
|
| a | 1 |
0.1%
|
|
| r | 1 |
0.1%
|
|
| Sysmiss | 748 |