| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not required | 62 |
71.3%
|
| 2 | 1 to 2 years | 21 |
24.1%
|
| 3 | 3 to 4 years | 2 |
2.3%
|
| 4 | 5 years and above | 2 |
2.3%
|
| Sysmiss | 15732 |