| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 1682 |
76.9%
|
| 2 | Once | 149 |
6.8%
|
| 3 | Twice | 121 |
5.5%
|
| 4 | 3-5 times | 89 |
4.1%
|
| 5 | 6-10 times | 55 |
2.5%
|
| 6 | 11-20 times | 32 |
1.5%
|
| 7 | More than 20 times | 47 |
2.1%
|
| 8 | Not applicable | 12 |
0.5%
|
| Sysmiss | 1 |