Value | Category | Cases | |
---|---|---|---|
-9 | Don't know (spontaneous) | 13 |
13.4%
|
1971 | 1 |
1%
|
|
1975 | 1 |
1%
|
|
1976 | 1 |
1%
|
|
1977 | 1 |
1%
|
|
1978 | 1 |
1%
|
|
1980 | 4 |
4.1%
|
|
1982 | 1 |
1%
|
|
1986 | 2 |
2.1%
|
|
1988 | 1 |
1%
|
|
1990 | 3 |
3.1%
|
|
1992 | 1 |
1%
|
|
1993 | 1 |
1%
|
|
1994 | 1 |
1%
|
|
1995 | 3 |
3.1%
|
|
1997 | 2 |
2.1%
|
|
1998 | 3 |
3.1%
|
|
2000 | 3 |
3.1%
|
|
2001 | 1 |
1%
|
|
2002 | 3 |
3.1%
|
|
2003 | 4 |
4.1%
|
|
2004 | 1 |
1%
|
|
2005 | 6 |
6.2%
|
|
2006 | 5 |
5.2%
|
|
2007 | 2 |
2.1%
|
|
2008 | 1 |
1%
|
|
2009 | 2 |
2.1%
|
|
2010 | 5 |
5.2%
|
|
2011 | 1 |
1%
|
|
2012 | 2 |
2.1%
|
|
2013 | 1 |
1%
|
|
2014 | 2 |
2.1%
|
|
2016 | 3 |
3.1%
|
|
2017 | 5 |
5.2%
|
|
2018 | 2 |
2.1%
|
|
2019 | 1 |
1%
|
|
2020 | 2 |
2.1%
|
|
2021 | 2 |
2.1%
|
|
2022 | 3 |
3.1%
|
|
Sysmiss | 256 |