| Value |
Category |
| 1 |
Less than a year |
| 2 |
1 year to less than 3 years |
| 3 |
3 years or more |
| 9 |
Unspecified |
| 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.