| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing data | 0 |
0%
|
| 1 | Incorrect answer | 871 |
36.3%
|
| 2 | Correct answer | 1468 |
61.2%
|
| 9 | Don't know | 61 |
2.5%
|
| 998 | Refused | 0 |
0%
|