| Value |
Category |
| -99 |
Refused |
| -98 |
Not Applicable |
| -6 |
Missing |
| 1 |
Easier |
| 2 |
Same |
| 3 |
More difficult |
| Sysmiss |
|
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.