| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 3099 |
68.8%
|
| 2 | Once | 217 |
4.8%
|
| 3 | Twice | 219 |
4.9%
|
| 4 | 3-5 times | 290 |
6.4%
|
| 5 | 6-10 times | 174 |
3.9%
|
| 6 | 11-20 times | 114 |
2.5%
|
| 7 | More than 20 times | 348 |
7.7%
|
| 8 | Not applicable | 8 |
0.2%
|
| Sysmiss | 37 |