| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 1 year | 94 |
18.6%
|
| 2 | 1 year to less than 2 years | 112 |
22.2%
|
| 3 | 2 years to less than 5 years | 93 |
18.4%
|
| 4 | 5 years or more | 206 |
40.8%
|
| Sysmiss | 4039 |