| Value |
Category |
| 1 |
older than 10 years old |
| 2 |
5 to 10 years old |
| 3 |
younger than 5 years old |
| 6 |
logically not applicable |
| 9 |
omitted |
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.