| Value |
Category |
| -9 |
Don't know (spontaneous) |
| -8 |
Refusal (spontaneous) |
| -7 |
Does not apply |
| 1977 |
|
| 1980 |
|
| 2008 |
|
| 2012 |
|
| 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.
