| Value |
Category |
| 1 |
18 to 20 |
| 2 |
21 to 23 |
| 3 |
24 to 26 |
| 4 |
27 to 29 |
| 5 |
30 to 32 |
| 6 |
33 to 35 |
| 7 |
36 to 38 |
| 8 |
39 to 41 |
| 9 |
42 to 44 |
| 10 |
45 to 49 |
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.