| Value |
Category |
| 1 |
higher r |
| 2 |
contam. |
| 3 |
contam. |
| 4 |
unqual. |
| 5 |
work in |
| 6 |
salt eva |
| 7 |
other |
| 8 |
do not i |
| 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.