| Value |
Category |
| 0 |
<12 months |
| 1 |
1 year |
| 2 |
2 years |
| 3 |
3 years |
| 4 |
4 years |
| 5 |
5 years |
| 6 |
6+ years |
| 7 |
Non-numeric |
| 8 |
Don't know |
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.
