| Value | Category | Cases | |
|---|---|---|---|
| 0 | None | 3650 |
48.7%
|
| 1 | Between 1 and 6 months | 3092 |
41.2%
|
| 2 | Between 6 and 12 months | 758 |
10.1%
|
| 3 | the whole year | 0 |
0%
|