| Value | Category | Cases | |
|---|---|---|---|
| 0 | Incorrect | 1007 |
4.7%
|
| 1 | Correct | 4395 |
20.4%
|
| 5 | Could not determine | 371 |
1.7%
|
| 9 | Don't know | 13254 |
61.6%
|
| 98 | Refused to answer | 13 |
0.1%
|
| 99 | Missing data | 2491 |
11.6%
|