| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 1711 |
54.3%
|
| 1 | Once | 3 |
0.1%
|
| 2 | More than once | 4 |
0.1%
|
| 3 | Not applicable | 1431 |
45.4%
|
| Sysmiss | 1 |