| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not required | 32 |
68.1%
|
| 2 | 1 to 2 years | 8 |
17%
|
| 3 | 3 to 4 years | 5 |
10.6%
|
| 4 | 5 years and above | 2 |
4.3%
|
| Sysmiss | 15772 |