| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 2 weeks | 1 |
0.5%
|
| 2 | Between 2 and 4 weeks | 8 |
3.9%
|
| 3 | Between 1 and 2 months | 8 |
3.9%
|
| 4 | Between 2 and 6 months | 21 |
10.1%
|
| 5 | More than 6 months | 52 |
25.1%
|
| 6 | Don’t know (uncertain) | 117 |
56.5%
|
| Sysmiss | 1850 |