| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 5 years | 81 |
38.4%
|
| 2 | 5 - 10 years | 66 |
31.3%
|
| 3 | 11 - 20 years | 33 |
15.6%
|
| 4 | More than 20 years | 31 |
14.7%
|