| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 1 year | 5 |
4.9%
|
| 2 | 1 - 2 years | 12 |
11.7%
|
| 3 | 2 - 4 years | 16 |
15.5%
|
| 4 | More than 5 years | 70 |
68%
|