| Value | Category | Cases | |
|---|---|---|---|
| 1 | No | 129 |
6.5%
|
| 2 | Once | 4 |
0.2%
|
| 3 | More than once | 11 |
0.6%
|
| 4 | Not applicable | 1839 |
92.5%
|
| Sysmiss | 5 |