| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 1121 |
51.2%
|
| 2 | Once | 41 |
1.9%
|
| 3 | Twice | 57 |
2.6%
|
| 4 | 3-5 times | 51 |
2.3%
|
| 5 | 6-10 times | 20 |
0.9%
|
| 6 | 11-20 times | 9 |
0.4%
|
| 7 | More than 20 times | 28 |
1.3%
|
| 8 | Not applicable | 855 |
39.1%
|
| Sysmiss | 6 |