| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 2 weeks | 3 |
2.1%
|
| 2 | Between 2 and 4 weeks | 1 |
0.7%
|
| 3 | Between 1 and 2 months | 9 |
6.3%
|
| 4 | Between 2 and 6 months | 8 |
5.6%
|
| 5 | More than 6 months | 31 |
21.7%
|
| 6 | Don’t know (uncertain) | 91 |
63.6%
|
| Sysmiss | 4406 |