| Value | Category | Cases | |
|---|---|---|---|
| 1 | no | 4078 |
79.9%
|
| 2 | Once | 6 |
0.1%
|
| 3 | More than once | 9 |
0.2%
|
| 4 | Not applicable | 1010 |
19.8%
|
| Sysmiss | 2 |