| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 6 months | 18 |
1.5%
|
| 2 | Between 6 months and 2 years | 136 |
11.5%
|
| 3 | Between 2 and 5 years | 326 |
27.6%
|
| 4 | More than 5 years | 700 |
59.2%
|
| 9 | Missing | 3 |
0.3%
|