| Value |
Category |
| 1 |
less than 12 months |
| 2 |
12 months to less than 36 months |
| 3 |
36 months or more |
| 94 |
na |
| 97 |
na |
| 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.