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.