| Value |
Category |
| 1 |
Nothing |
| 2 |
In part |
| 3 |
In great part |
| 4 |
Fully/totally |
| 5 |
No special qualifications |
| 6 |
Refused to answer |
| 99 |
N/R |
| 999 |
N/A |
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.