| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 2 weeks | 4 |
0.8%
|
| 2 | Between 2 and 4 weeks | 4 |
0.8%
|
| 3 | Between 1 and 2 months | 18 |
3.7%
|
| 4 | Between 2 and 6 months | 25 |
5.1%
|
| 5 | More than 6 months | 254 |
52.2%
|
| 6 | Don’t know (uncertain) | 182 |
37.4%
|
| Sysmiss | 643 |