| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 3118 |
99%
|
| 1 | Once | 21 |
0.7%
|
| 2 | More than once | 10 |
0.3%
|
| 3 | Not applicable | 0 |
0%
|
| Sysmiss | 1 |