| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than a year | 110 |
32.2%
|
| 2 | 1 year to less than 3 years | 163 |
47.7%
|
| 3 | 3 years or more | 69 |
20.2%
|
| Sysmiss | 9657 |