| Value | Category | Cases | |
|---|---|---|---|
| -97 | Don't know | 37 |
5.3%
|
| 1 | 1 week | 72 |
10.4%
|
| 2 | 2 weeks | 81 |
11.7%
|
| 3 | 3 weeks | 132 |
19.1%
|
| 4 | 4 weeks | 370 |
53.5%
|
| a | Not applicable | 0 | |
| b | Don't know | 0 | |
| c | Refused to respond | 0 |