| Value |
Category |
| -98 |
Could not observe |
| -97 |
refused to show |
| -95 |
|
| 0 |
Don't have card |
| 1 |
Light blue |
| 2 |
white |
| 3 |
yellow |
| 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.