| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than two weeks | 74 |
7.4%
|
| 2 | About one month | 166 |
16.6%
|
| 3 | About two months | 191 |
19.1%
|
| 4 | More than two months | 420 |
42%
|
| 5 | Don't know | 140 |
14%
|
| 6 | Refused | 9 |
0.9%
|