| Value | Category | Cases | |
|---|---|---|---|
| 1 | none | 50 |
11.5%
|
| 2 | less than 1 month | 54 |
12.4%
|
| 3 | 1-3 months | 148 |
34%
|
| 4 | 4-6 months | 57 |
13.1%
|
| 5 | over 6 months | 126 |
29%
|