| Value | Category | Cases | |
|---|---|---|---|
| 1 | no | 3214 |
63%
|
| 2 | Once | 8 |
0.2%
|
| 3 | More than once | 17 |
0.3%
|
| 4 | Not applicable | 1864 |
36.5%
|
| Sysmiss | 2 |