| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not at all | 477 |
30.2%
|
| 2 | Per week | 6 |
0.4%
|
| 3 | Per month | 130 |
8.2%
|
| 4 | Per year | 964 |
61.1%
|
| 99 | N/A | 0 |
0%
|
| Sysmiss | 420 |