| Value |
Category |
| -999 |
Don't know |
| -888 |
Refuse to answer |
| -666 |
Other (please specify) |
| 2 |
NACVET |
| 3 |
IMIS |
| 4 |
NVTI |
| 5 |
City and Guild |
| 6 |
Certificate |
| 7 |
Diploma |
| 11 |
.D |
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.