Value | Category | Cases | |
---|---|---|---|
-9 | Don't know (spontaneous) | 185 |
39.4%
|
1947 | 1 |
0.2%
|
|
1950 | 1 |
0.2%
|
|
1952 | 1 |
0.2%
|
|
1962 | 1 |
0.2%
|
|
1972 | 1 |
0.2%
|
|
1975 | 2 |
0.4%
|
|
1976 | 1 |
0.2%
|
|
1977 | 1 |
0.2%
|
|
1978 | 1 |
0.2%
|
|
1979 | 1 |
0.2%
|
|
1982 | 1 |
0.2%
|
|
1983 | 1 |
0.2%
|
|
1984 | 2 |
0.4%
|
|
1985 | 3 |
0.6%
|
|
1987 | 2 |
0.4%
|
|
1988 | 2 |
0.4%
|
|
1989 | 2 |
0.4%
|
|
1990 | 5 |
1.1%
|
|
1991 | 2 |
0.4%
|
|
1992 | 5 |
1.1%
|
|
1993 | 1 |
0.2%
|
|
1994 | 4 |
0.9%
|
|
1995 | 6 |
1.3%
|
|
1996 | 5 |
1.1%
|
|
1998 | 13 |
2.8%
|
|
1999 | 9 |
1.9%
|
|
2000 | 16 |
3.4%
|
|
2001 | 11 |
2.3%
|
|
2002 | 9 |
1.9%
|
|
2003 | 8 |
1.7%
|
|
2004 | 7 |
1.5%
|
|
2005 | 6 |
1.3%
|
|
2006 | 10 |
2.1%
|
|
2007 | 6 |
1.3%
|
|
2008 | 11 |
2.3%
|
|
2009 | 19 |
4.1%
|
|
2010 | 27 |
5.8%
|
|
2011 | 9 |
1.9%
|
|
2012 | 16 |
3.4%
|
|
2013 | 8 |
1.7%
|
|
2014 | 10 |
2.1%
|
|
2015 | 6 |
1.3%
|
|
2016 | 9 |
1.9%
|
|
2017 | 16 |
3.4%
|
|
2018 | 6 |
1.3%
|
|
Sysmiss | 627 |