| Value | Category | Cases | |
|---|---|---|---|
| 1 | No | 4403 |
97.7%
|
| 2 | Once | 32 |
0.7%
|
| 3 | More than once | 23 |
0.5%
|
| 4 | Not applicable | 30 |
0.7%
|
| Sysmiss | 18 |