| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1 Yes, effective | 461 |
9.6%
|
| 2 | 2 No, ineffective | 2844 |
59.2%
|
| 3 | 3 (DK) | 1403 |
29.2%
|
| 4 | 4 (Refused) | 94 |
2%
|
| Sysmiss | 1094481 |