Value | Category | Cases | |
---|---|---|---|
1 | Don't know | 898 |
36%
|
1960 | 3 |
0.1%
|
|
1970 | 12 |
0.5%
|
|
1972 | 4 |
0.2%
|
|
1977 | 8 |
0.3%
|
|
1978 | 6 |
0.2%
|
|
1979 | 1 |
0%
|
|
1980 | 19 |
0.8%
|
|
1981 | 13 |
0.5%
|
|
1982 | 1 |
0%
|
|
1983 | 11 |
0.4%
|
|
1984 | 29 |
1.2%
|
|
1985 | 12 |
0.5%
|
|
1986 | 13 |
0.5%
|
|
1987 | 5 |
0.2%
|
|
1988 | 5 |
0.2%
|
|
1989 | 5 |
0.2%
|
|
1990 | 16 |
0.6%
|
|
1991 | 5 |
0.2%
|
|
1992 | 12 |
0.5%
|
|
1993 | 43 |
1.7%
|
|
1994 | 24 |
1%
|
|
1995 | 12 |
0.5%
|
|
1996 | 3 |
0.1%
|
|
1997 | 12 |
0.5%
|
|
1998 | 44 |
1.8%
|
|
1999 | 23 |
0.9%
|
|
2000 | 82 |
3.3%
|
|
2001 | 33 |
1.3%
|
|
2002 | 12 |
0.5%
|
|
2003 | 24 |
1%
|
|
2004 | 33 |
1.3%
|
|
2005 | 24 |
1%
|
|
2006 | 41 |
1.6%
|
|
2007 | 70 |
2.8%
|
|
2008 | 49 |
2%
|
|
2009 | 105 |
4.2%
|
|
2010 | 130 |
5.2%
|
|
2011 | 82 |
3.3%
|
|
2012 | 177 |
7.1%
|
|
2013 | 196 |
7.9%
|
|
2014 | 188 |
7.5%
|
|
2015 | 9 |
0.4%
|
|
Sysmiss | 12563 |