Value | Category |
---|---|
1 | Less than a month |
2 | 1 month to less than 2 months |
3 | 2 months to less than 3 months |
4 | 3 months to less than 4 months |
5 | 4 months to less than 6 months |
6 | 6 months to less than 1 year |
7 | 1 year to less than 3 years |
8 | 3 years or more |
9 | Don't know |
88 | Not applicable |
99 | Unspecified |