Value | Category | Cases | |
---|---|---|---|
-9 | Don't know (spontaneous) | 10 |
4.9%
|
1920 | 1 |
0.5%
|
|
1955 | 1 |
0.5%
|
|
1957 | 1 |
0.5%
|
|
1960 | 2 |
1%
|
|
1965 | 1 |
0.5%
|
|
1968 | 1 |
0.5%
|
|
1970 | 2 |
1%
|
|
1980 | 3 |
1.5%
|
|
1988 | 1 |
0.5%
|
|
1990 | 10 |
4.9%
|
|
1991 | 7 |
3.4%
|
|
1992 | 5 |
2.4%
|
|
1993 | 6 |
2.9%
|
|
1994 | 10 |
4.9%
|
|
1995 | 13 |
6.3%
|
|
1996 | 12 |
5.8%
|
|
1997 | 1 |
0.5%
|
|
1998 | 3 |
1.5%
|
|
1999 | 5 |
2.4%
|
|
2000 | 20 |
9.7%
|
|
2001 | 5 |
2.4%
|
|
2002 | 5 |
2.4%
|
|
2003 | 4 |
1.9%
|
|
2004 | 1 |
0.5%
|
|
2005 | 2 |
1%
|
|
2006 | 3 |
1.5%
|
|
2007 | 8 |
3.9%
|
|
2008 | 5 |
2.4%
|
|
2009 | 5 |
2.4%
|
|
2010 | 7 |
3.4%
|
|
2011 | 4 |
1.9%
|
|
2012 | 7 |
3.4%
|
|
2013 | 14 |
6.8%
|
|
2014 | 8 |
3.9%
|
|
2015 | 5 |
2.4%
|
|
2016 | 5 |
2.4%
|
|
2017 | 3 |
1.5%
|
|
Sysmiss | 198 |