| Value | Category | Cases | |
|---|---|---|---|
| 1 | between 5 to 9 years | 2422 |
21.8%
|
| 2 | between 10 to 20 years | 2172 |
19.6%
|
| 3 | more than 20 years | 1541 |
13.9%
|
| 4 | like any other person | 2492 |
22.4%
|
| 8 | don't know | 2480 |
22.3%
|
| Sysmiss | 652 |