| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not at all | 1394 |
70.9%
|
| 2 | Per week | 26 |
1.3%
|
| 3 | Per month | 149 |
7.6%
|
| 4 | Per year | 397 |
20.2%
|
| 99 | N/A | 0 |
0%
|
| Sysmiss | 31 |