| Value | Category | Cases | |
|---|---|---|---|
| 1 | No | 4381 |
97.2%
|
| 2 | Once | 48 |
1.1%
|
| 3 | More than once | 34 |
0.8%
|
| 4 | Not applicable | 27 |
0.6%
|
| Sysmiss | 16 |