| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 2101 |
46.6%
|
| 2 | Once | 170 |
3.8%
|
| 3 | Twice | 324 |
7.2%
|
| 4 | 3-5 times | 463 |
10.3%
|
| 5 | 6-10 times | 320 |
7.1%
|
| 6 | 11-20 times | 287 |
6.4%
|
| 7 | More than 20 times | 795 |
17.6%
|
| 8 | Not applicable | 9 |
0.2%
|
| Sysmiss | 37 |