| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing data | 1 |
0.1%
|
| 1 | Incorrect answer | 153 |
12.8%
|
| 2 | Correct answer | 877 |
73.2%
|
| 9 | Don't know | 167 |
13.9%
|
| 998 | Refused | 0 |
0%
|