| Value | Category | Cases | |
|---|---|---|---|
| -9 | REFUSED | 18 |
0.4%
|
| 1 | YES | 142 |
2.8%
|
| 2 | NO | 3998 |
79.1%
|
| 7 | NOT APPLICABLE | 899 |
17.8%
|
| Sysmiss | 5620 |