| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 1 month | 15 |
3.1%
|
| 2 | Between 1 and 3 months | 24 |
5%
|
| 3 | Between 3 and 6 months | 27 |
5.6%
|
| 4 | Between 6 months and 1 year | 21 |
4.3%
|
| 5 | Between 1 and 2 years | 49 |
10.1%
|
| 6 | More than 2 years | 132 |
27.3%
|
| 7 | Not applicable | 216 |
44.6%
|