| Value | Category | Cases | |
|---|---|---|---|
| -9 | REFUSED | 0 |
0%
|
| 1 | YES | 898 |
20.4%
|
| 2 | NO | 2826 |
64.2%
|
| 7 | NOT APPLICABLE | 681 |
15.5%
|
| Sysmiss | 4751 |