Value | Category |
---|---|
1 | < 1week |
2 | 1 week but < 1 month |
3 | 1 month but < 3 months |
4 | 3 months but < 6 months |
5 | 6 months but < 9 months |
6 | 9 months but < 12 months |
7 | 12 months but < 2 years |
8 | 2 years and over |
9 | have/has not tried |
10 | other |
99 | not stated |