| Value | Category | Cases | |
|---|---|---|---|
| -9 | REFUSED | 14 |
0.3%
|
| 1 | YES | 596 |
11.8%
|
| 2 | NO | 4353 |
86.1%
|
| 7 | NOT APPLICABLE | 94 |
1.9%
|
| Sysmiss | 5620 |