| Value | Category | Cases | |
|---|---|---|---|
| 1 | In less than 6 months | 25 |
25.8%
|
| 2 | In 6 to 12 months | 18 |
18.6%
|
| 3 | In more than 12 months | 7 |
7.2%
|
| 4 | Don't know yet | 47 |
48.5%
|
| 11 | .Z | 848 |