| Value |
Category |
| -66 |
Don't know |
| 0 |
|
| 1 |
Less than 1 year |
| 2 |
Between 1 to 2 years |
| 3 |
Over 2 years |
| 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.