| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 5 |
1.6%
|
| 1 | Current | 0 |
0%
|
| 2 | Ever | 305 |
98.4%
|
| 8 | Unknown | 0 |
0%
|
| 9 | Missing | 0 | |
| Sysmiss | 2 |