| Value | Category | Cases | |
|---|---|---|---|
| -9 | REFUSED | 17 |
0.2%
|
| 1 | YES | 977 |
12.2%
|
| 2 | NO | 6662 |
83.2%
|
| 7 | NOT APPLICABLE | 350 |
4.4%
|
| Sysmiss | 5 |