| Value |
Category |
| 0 |
Incorrect |
| 1 |
Correct |
| 5 |
Could not determine |
| 9 |
Don't know |
| 98 |
Refused to answer |
| 99 |
Missing data |
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.