| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. yes | 2506 |
0.6%
|
| 2 | 2. no | 430438 |
99.2%
|
| 3 | 3. don't know | 27 |
0%
|
| 9 | 9. unspecified | 1122 |
0.3%
|
| Sysmiss | 7013467 |