| Value | Category | Cases | |
|---|---|---|---|
| 1 | In less than 6 months | 197 |
9.2%
|
| 2 | In 6 to 12 months | 191 |
8.9%
|
| 3 | In more than 12 months | 202 |
9.4%
|
| 4 | Don't know yet | 1548 |
72.4%
|
| Sysmiss | 3179 |