| Value | Category | Cases | |
|---|---|---|---|
| 1 | no | 1276 |
25%
|
| 2 | Once | 6 |
0.1%
|
| 3 | More than once | 11 |
0.2%
|
| 4 | Not applicable | 3810 |
74.6%
|
| Sysmiss | 2 |