| Value |
Category |
| -1 |
Missing |
| 1 |
Very easy |
| 2 |
Easy |
| 3 |
Difficult |
| 4 |
Very difficult |
| 7 |
Don't have to pay taxes |
| 9 |
Don't know |
| 998 |
Refused |
| 997 |
Not asked |
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.