| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 4009 |
89%
|
| 2 | Once | 121 |
2.7%
|
| 3 | Twice | 38 |
0.8%
|
| 4 | 3-5 times | 47 |
1%
|
| 5 | 6-10 times | 16 |
0.4%
|
| 6 | 11-20 times | 9 |
0.2%
|
| 7 | More than 20 times | 59 |
1.3%
|
| 8 | Not applicable | 170 |
3.8%
|
| Sysmiss | 37 |