| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 1935 |
61.4%
|
| 1 | Once | 3 |
0.1%
|
| 2 | More than once | 2 |
0.1%
|
| 3 | Not applicable | 1209 |
38.4%
|
| Sysmiss | 1 |