| Value | Category | Cases | |
|---|---|---|---|
| 1 | No | 3028 |
67.2%
|
| 2 | Once | 11 |
0.2%
|
| 3 | More than once | 13 |
0.3%
|
| 4 | Not applicable | 1436 |
31.9%
|
| Sysmiss | 18 |