| Value | Category | Cases | |
|---|---|---|---|
| -95 | Refused | 0 |
0%
|
| 0 | Never | 1598 |
79.6%
|
| 1 | Once | 186 |
9.3%
|
| 2 | From time to time | 131 |
6.5%
|
| 3 | Often | 59 |
2.9%
|
| r | 34 |
1.7%
|
|
| Sysmiss | 727 |