| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 1 year | 204 |
4.4%
|
| 2 | More than 1 year, and less than 2 years | 329 |
7.1%
|
| 3 | More than 2 years and less than 5 years | 1257 |
27%
|
| 4 | More than 5 years | 2861 |
61.5%
|
| Sysmiss | 1385 |