Value | Category | Cases | |
---|---|---|---|
-2 | don't know | 55 |
34.8%
|
1968 | 1 |
0.6%
|
|
1970 | 2 |
1.3%
|
|
1974 | 1 |
0.6%
|
|
1978 | 1 |
0.6%
|
|
1979 | 1 |
0.6%
|
|
1980 | 7 |
4.4%
|
|
1982 | 1 |
0.6%
|
|
1983 | 1 |
0.6%
|
|
1984 | 2 |
1.3%
|
|
1985 | 7 |
4.4%
|
|
1986 | 3 |
1.9%
|
|
1987 | 4 |
2.5%
|
|
1988 | 7 |
4.4%
|
|
1989 | 5 |
3.2%
|
|
1990 | 9 |
5.7%
|
|
1991 | 1 |
0.6%
|
|
1992 | 7 |
4.4%
|
|
1994 | 5 |
3.2%
|
|
1995 | 3 |
1.9%
|
|
1996 | 3 |
1.9%
|
|
1997 | 3 |
1.9%
|
|
1998 | 6 |
3.8%
|
|
1999 | 2 |
1.3%
|
|
2000 | 1 |
0.6%
|
|
2001 | 1 |
0.6%
|
|
2002 | 3 |
1.9%
|
|
2003 | 3 |
1.9%
|
|
2005 | 1 |
0.6%
|
|
2006 | 3 |
1.9%
|
|
2007 | 1 |
0.6%
|
|
2008 | 4 |
2.5%
|
|
2009 | 4 |
2.5%
|
|
Sysmiss | 891 |