Value | Category | Cases | |
---|---|---|---|
0 | 57 |
4.9%
|
|
1 | Before 1990 | 430 |
36.7%
|
2 | From 1990-95 | 193 |
16.5%
|
3 | since 1995 | 370 |
31.6%
|
4 | 2001-2002 | 82 |
7%
|
9 | Don't know | 39 |
3.3%
|
Sysmiss | 1762 |