| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 1590 |
72.7%
|
| 2 | Once | 122 |
5.6%
|
| 3 | Twice | 118 |
5.4%
|
| 4 | 3-5 times | 100 |
4.6%
|
| 5 | 6-10 times | 53 |
2.4%
|
| 6 | 11-20 times | 25 |
1.1%
|
| 7 | More than 20 times | 79 |
3.6%
|
| 8 | Not applicable | 100 |
4.6%
|
| Sysmiss | 1 |