| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 1739 |
87.5%
|
| 2 | Once | 108 |
5.4%
|
| 3 | Twice | 57 |
2.9%
|
| 4 | 3-5 times | 45 |
2.3%
|
| 5 | 6-10 times | 20 |
1%
|
| 6 | 11-20 times | 8 |
0.4%
|
| 7 | More than 20 times | 8 |
0.4%
|
| Sysmiss | 3 |