| Value | Category | Cases | |
|---|---|---|---|
| 1 | No | 475 |
10.5%
|
| 2 | Once | 3 |
0.1%
|
| 3 | More than once | 0 |
0%
|
| 4 | Not applicable | 4011 |
89%
|
| Sysmiss | 17 |