| Value |
Category |
| 1 |
under 6 mth. |
| 2 |
6mth _ under 1 |
| 3 |
1 yr_under 2 yr |
| 4 |
2 yr_under 3 yr |
| 5 |
3 yr & 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.