| Value | Category | Cases | |
|---|---|---|---|
| 1 | In less than 6 months | 304 |
22.6%
|
| 2 | In 6 to 12 months | 351 |
26.1%
|
| 3 | In more than 12 months | 197 |
14.6%
|
| 4 | Don't know yet | 495 |
36.7%
|
| Sysmiss | 8128 |