| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 1531 |
70%
|
| 2 | Once | 29 |
1.3%
|
| 3 | Twice | 39 |
1.8%
|
| 4 | 3-5 times | 26 |
1.2%
|
| 5 | 6-10 times | 18 |
0.8%
|
| 6 | 11-20 times | 15 |
0.7%
|
| 7 | More than 20 times | 25 |
1.1%
|
| 8 | Not applicable | 499 |
22.8%
|
| Sysmiss | 6 |