| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than two weeks | 67 |
6.6%
|
| 2 | About one month | 205 |
20.3%
|
| 3 | About two months | 284 |
28.2%
|
| 4 | More than two months | 436 |
43.3%
|
| 5 | Don't know | 11 |
1.1%
|
| 6 | Refused | 5 |
0.5%
|