| Value | Category | Cases | |
|---|---|---|---|
| 1 | No | 4242 |
94.1%
|
| 2 | Once | 86 |
1.9%
|
| 3 | More than once | 130 |
2.9%
|
| 4 | Not applicable | 31 |
0.7%
|
| Sysmiss | 17 |