| Value |
Category |
| 1 |
Less than 1 year |
| 2 |
1 to 2 years |
| 3 |
3 to 4 years |
| 4 |
5 to 6 years |
| 5 |
7 to 8 years |
| 6 |
9 to 10 years |
| 7 |
11 to 12 years |
| 8 |
More than 12 yrs |
| 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.