| Value |
Category |
| 1 |
This year |
| 2 |
Last year |
| 3 |
Two years ago |
| 4 |
Three years ago |
| 5 |
Four years ago |
| 6 |
More than four years ago |
| 8 |
Not applicable |
| 9 |
Unspecified |
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.