| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than two weeks | 104 |
10.4%
|
| 2 | About one month | 227 |
22.7%
|
| 3 | About two months | 142 |
14.2%
|
| 4 | More than two months | 398 |
39.8%
|
| 5 | Don't know | 120 |
12%
|
| 6 | Refused | 9 |
0.9%
|