| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing data | 1 |
0.1%
|
| 1 | Incorrect answer | 342 |
28.5%
|
| 2 | Correct answer | 684 |
57.1%
|
| 9 | Don't know | 171 |
14.3%
|
| 998 | Refused | 0 |
0%
|