| Value | Category | Cases | |
|---|---|---|---|
| 0 | 2016349 |
62.5%
|
|
| 1 | 1. yes | 247589 |
7.7%
|
| 2 | 2. no | 318612 |
9.9%
|
| 3 | 3. don't know | 9929 |
0.3%
|
| 8 | 8. not applicable | 634447 |
19.7%
|
| 9 | 9. unspecified | 1686 |
0.1%
|
| Sysmiss | 4218948 |