Value | Category | Cases | |
---|---|---|---|
-2 | don't know | 30 |
41.7%
|
1900 | 1 |
1.4%
|
|
1964 | 1 |
1.4%
|
|
1974 | 1 |
1.4%
|
|
1980 | 3 |
4.2%
|
|
1986 | 4 |
5.6%
|
|
1987 | 1 |
1.4%
|
|
1988 | 1 |
1.4%
|
|
1989 | 2 |
2.8%
|
|
1990 | 4 |
5.6%
|
|
1991 | 1 |
1.4%
|
|
1992 | 1 |
1.4%
|
|
1994 | 2 |
2.8%
|
|
1995 | 1 |
1.4%
|
|
1996 | 1 |
1.4%
|
|
1997 | 2 |
2.8%
|
|
1999 | 1 |
1.4%
|
|
2000 | 2 |
2.8%
|
|
2001 | 2 |
2.8%
|
|
2002 | 1 |
1.4%
|
|
2004 | 2 |
2.8%
|
|
2006 | 3 |
4.2%
|
|
2007 | 2 |
2.8%
|
|
2008 | 1 |
1.4%
|
|
2009 | 2 |
2.8%
|
|
Sysmiss | 977 |