Value |
Category |
1 |
less than 6 months ago |
2 |
6-11 months ago |
3 |
1-5 years ago |
4 |
more than 5 years ago |
8 |
don't know |
11 |
.Z |
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.