| Value | Category | Cases | |
|---|---|---|---|
| 1 | No | 3541 |
78.6%
|
| 2 | Once | 23 |
0.5%
|
| 3 | More than once | 28 |
0.6%
|
| 4 | Not applicable | 898 |
19.9%
|
| Sysmiss | 16 |