Value |
Category |
0 |
Less than one year |
1 |
Class |
2 |
Class |
3 |
Class |
4 |
Class |
5 |
Class |
6 |
Class |
7 |
Class |
8 |
Class |
9 |
Class |
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.