| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not required | 97 |
66%
|
| 2 | 1 to 2 years | 34 |
23.1%
|
| 3 | 3 to 4 years | 11 |
7.5%
|
| 4 | 5 years and above | 5 |
3.4%
|
| Sysmiss | 15672 |