| Value | Category | Cases | |
|---|---|---|---|
| 1 | no | 4981 |
97.6%
|
| 2 | Once | 22 |
0.4%
|
| 3 | More than once | 23 |
0.5%
|
| 4 | Not applicable | 77 |
1.5%
|
| Sysmiss | 2 |