| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 3614 |
80.2%
|
| 2 | Once | 87 |
1.9%
|
| 3 | Twice | 138 |
3.1%
|
| 4 | 3-5 times | 168 |
3.7%
|
| 5 | 6-10 times | 128 |
2.8%
|
| 6 | 11-20 times | 79 |
1.8%
|
| 7 | More than 20 times | 226 |
5%
|
| 8 | Not applicable | 27 |
0.6%
|
| Sysmiss | 39 |