| Value | Category | Cases | |
|---|---|---|---|
| 1 | No | 63 |
1.4%
|
| 2 | Once | 3 |
0.1%
|
| 3 | More than once | 0 |
0%
|
| 4 | Not applicable | 4423 |
98.2%
|
| Sysmiss | 17 |