| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not required | 206 |
62.6%
|
| 2 | 1 to 2 years | 91 |
27.7%
|
| 3 | 3 to 4 years | 24 |
7.3%
|
| 4 | 5 years and above | 8 |
2.4%
|
| Sysmiss | 15490 |