| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than two weeks | 77 |
7.7%
|
| 2 | About one month | 202 |
20.2%
|
| 3 | About two months | 199 |
19.9%
|
| 4 | More than two months | 496 |
49.6%
|
| 5 | Don't know | 22 |
2.2%
|
| 6 | Refused | 4 |
0.4%
|