| 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.