| Value |
Category |
| 0 |
Not given |
| 21 |
|
| 23 |
|
| 28 |
|
| 44 |
Marked on card |
| 97 |
Inconsistent |
| 98 |
DK |
| 99 |
Missing |
| 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.