| Value | Category | Cases | |
|---|---|---|---|
| 0 | Incorrect | 814 |
3.8%
|
| 1 | Correct | 5185 |
24.1%
|
| 5 | Could not determine | 237 |
1.1%
|
| 9 | Don't know | 12390 |
57.5%
|
| 98 | Refused to answer | 14 |
0.1%
|
| 99 | Missing data | 2891 |
13.4%
|