| Value |
Category |
| 1 |
Less than 6 months |
| 2 |
6 months to less than 1 year' |
| 3 |
1 year to less than 2 years' |
| 4 |
2 years or above' |
| 9 |
|
| Sysmiss |
|
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.