| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 1 year | 45 |
22.8%
|
| 2 | 1 year to less than 2 years | 39 |
19.8%
|
| 3 | 2 years to less than 5 years | 33 |
16.8%
|
| 4 | 5 years or more | 80 |
40.6%
|
| Sysmiss | 4347 |