| Value | Category | Cases | |
|---|---|---|---|
| 1 | no | 602 |
11.8%
|
| 2 | Once | 3 |
0.1%
|
| 3 | More than once | 8 |
0.2%
|
| 4 | Not applicable | 4490 |
88%
|
| Sysmiss | 2 |