| Value | Category | Cases | |
|---|---|---|---|
| Don't know | 5 |
0.1%
|
|
| More than a week, less than a month | 36 |
0.8%
|
|
| One month or more | 32 |
0.7%
|
|
| Other, specify | 15 |
0.3%
|
|
| 4598 |
98.1%
|