| Value |
Category |
| 30 |
|
| 40 |
|
| 60 |
|
| 77 |
refused |
| 88 |
don't know |
| 99 |
missing |
| 105 |
|
| 135 |
|
| 175 |
|
| 180 |
|
| 230 |
|
| 300 |
|
| 320 |
|
| 600 |
|
| 720 |
|
| 900 |
|
| 960 |
|
| 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.