| Value | Category | Cases | |
|---|---|---|---|
| 1 | no | 3334 |
65.3%
|
| 2 | Once | 7 |
0.1%
|
| 3 | More than once | 19 |
0.4%
|
| 4 | Not applicable | 1743 |
34.1%
|
| Sysmiss | 2 |