| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 2 weeks | 1 |
0.2%
|
| 2 | Between 2 and 4 weeks | 7 |
1.4%
|
| 3 | Between 1 and 2 months | 16 |
3.3%
|
| 4 | Between 2 and 6 months | 35 |
7.2%
|
| 5 | More than 6 months | 354 |
72.4%
|
| 6 | Don’t know (uncertain) | 76 |
15.5%
|
| Sysmiss | 606 |