| Value | Category | Cases | |
|---|---|---|---|
| 1 | six months | 391 |
38.8%
|
| 2 | 12 months | 324 |
32.2%
|
| 3 | 24 months | 139 |
13.8%
|
| 4 | I won't accept | 153 |
15.2%
|