| Value | Category | Cases | |
|---|---|---|---|
| 1 | less than or equal to 6 months | 757 |
10.2%
|
| 2 | more than 6 months but less than or equal to 1 year | 1690 |
22.8%
|
| 3 | more than 1 year but less than or equal to 2 years | 2014 |
27.1%
|
| 4 | more than 2 years but less than or equal to 3 years | 1320 |
17.8%
|
| 5 | more than three years | 1643 |
22.1%
|
| Sysmiss | 408908 |