| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 6 months | 140 |
13.7%
|
| 2 | 6 months to less than 1 year' | 253 |
24.7%
|
| 3 | 1 year to less than 2 years' | 137 |
13.4%
|
| 4 | 2 years or above' | 473 |
46.2%
|
| 9 | 21 |
2.1%
|
|
| Sysmiss | 10985 |