| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 1 year | 6 |
28.6%
|
| 2 | 1 year to less than 2 years | 10 |
47.6%
|
| 3 | 2 years to less than 5 years | 3 |
14.3%
|
| 4 | 5 years or more | 2 |
9.5%
|
| Sysmiss | 4523 |