| Value | Category | Cases | |
|---|---|---|---|
| 1 | No | 289 |
14.5%
|
| 2 | Once | 2 |
0.1%
|
| 3 | More than once | 3 |
0.2%
|
| 4 | Not applicable | 1691 |
85.1%
|
| Sysmiss | 3 |