| Value | Category | Cases | |
|---|---|---|---|
| 1 | between 5 to 9 years | 2733 |
21.7%
|
| 2 | between 10 to 20 years | 3151 |
25%
|
| 3 | more than 20 years | 1985 |
15.7%
|
| 4 | like any other person | 2349 |
18.6%
|
| 8 | don't know | 2390 |
19%
|
| Sysmiss | 307 |