Value |
Category |
1 |
none |
2 |
1 year |
3 |
2 years |
4 |
3 years |
5 |
4 years |
6 |
5 years |
7 |
6 years |
8 |
7 years & over |
9 |
not stated |
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.