| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 1240 |
39.4%
|
| 1 | Once | 2 |
0.1%
|
| 2 | More than once | 2 |
0.1%
|
| 3 | Not applicable | 1905 |
60.5%
|
| Sysmiss | 1 |