| Value |
Category |
| 0 |
no condi |
| 1 |
both are |
| 2 |
use 0, m |
| 3 |
use 1, m |
| 4 |
both 0 |
| 7 |
both mis |
| 8 |
use miss |
| 9 |
modern m |
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.