| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 1165 |
53.2%
|
| 2 | Once | 63 |
2.9%
|
| 3 | Twice | 65 |
3%
|
| 4 | 3-5 times | 52 |
2.4%
|
| 5 | 6-10 times | 32 |
1.5%
|
| 6 | 11-20 times | 15 |
0.7%
|
| 7 | More than 20 times | 51 |
2.3%
|
| 8 | Not applicable | 738 |
33.7%
|
| Sysmiss | 7 |