| Value | Category | Cases | |
|---|---|---|---|
| 1 | No | 2651 |
58.8%
|
| 2 | Once | 81 |
1.8%
|
| 3 | More than once | 320 |
7.1%
|
| 4 | Not applicable | 1437 |
31.9%
|
| Sysmiss | 17 |