| Value | Category | Cases | |
|---|---|---|---|
| 1 | No | 4391 |
97.4%
|
| 2 | Once | 50 |
1.1%
|
| 3 | More than once | 30 |
0.7%
|
| 4 | Not applicable | 18 |
0.4%
|
| Sysmiss | 17 |