| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than a year | 101 |
31.6%
|
| 2 | 1 year to less than 3 years | 150 |
46.9%
|
| 3 | 3 years or more | 69 |
21.6%
|
| Sysmiss | 9679 |