| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 4053 |
89.9%
|
| 2 | Once | 121 |
2.7%
|
| 3 | Twice | 80 |
1.8%
|
| 4 | 3-5 times | 57 |
1.3%
|
| 5 | 6-10 times | 46 |
1%
|
| 6 | 11-20 times | 24 |
0.5%
|
| 7 | More than 20 times | 79 |
1.8%
|
| 8 | Not applicable | 9 |
0.2%
|
| Sysmiss | 37 |