| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 1788 |
81.7%
|
| 2 | Once | 87 |
4%
|
| 3 | Twice | 57 |
2.6%
|
| 4 | 3-5 times | 56 |
2.6%
|
| 5 | 6-10 times | 31 |
1.4%
|
| 6 | 11-20 times | 20 |
0.9%
|
| 7 | More than 20 times | 48 |
2.2%
|
| 8 | Not applicable | 100 |
4.6%
|
| Sysmiss | 1 |