| Value | Category | Cases | |
|---|---|---|---|
| 1 | No | 3572 |
79.3%
|
| 2 | Once | 16 |
0.4%
|
| 3 | More than once | 5 |
0.1%
|
| 4 | Not applicable | 896 |
19.9%
|
| Sysmiss | 17 |