| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 4074 |
92.2%
|
| 2 | Once | 123 |
2.8%
|
| 3 | Twice | 75 |
1.7%
|
| 4 | 3-5 times | 44 |
1%
|
| 5 | 6-10 times | 36 |
0.8%
|
| 6 | 11-20 times | 16 |
0.4%
|
| 7 | More than 20 times | 40 |
0.9%
|
| 8 | Not applicable | 4 |
0.1%
|
| Sysmiss | 5 |