| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 1279 |
58.5%
|
| 2 | Once | 12 |
0.5%
|
| 3 | Twice | 8 |
0.4%
|
| 4 | 3-5 times | 20 |
0.9%
|
| 5 | 6-10 times | 7 |
0.3%
|
| 6 | 11-20 times | 0 |
0%
|
| 7 | More than 20 times | 9 |
0.4%
|
| 8 | Not applicable | 847 |
38.7%
|
| Sysmiss | 6 |