| Value | Category | Cases | |
|---|---|---|---|
| 1 | between 5 to 9 years | 12583 |
21.2%
|
| 2 | between 10 to 20 years | 12572 |
21.1%
|
| 3 | more than 20 years | 8380 |
14.1%
|
| 4 | like any other person | 12082 |
20.3%
|
| 8 | don't know | 13844 |
23.3%
|
| Sysmiss | 3132 |