Value | Category | Cases | |
---|---|---|---|
-9 | Don't know (spontaneous) | 60 |
42.3%
|
1972 | 1 |
0.7%
|
|
1999 | 1 |
0.7%
|
|
2002 | 2 |
1.4%
|
|
2003 | 1 |
0.7%
|
|
2005 | 2 |
1.4%
|
|
2006 | 7 |
4.9%
|
|
2007 | 2 |
1.4%
|
|
2009 | 1 |
0.7%
|
|
2010 | 3 |
2.1%
|
|
2011 | 3 |
2.1%
|
|
2012 | 4 |
2.8%
|
|
2013 | 4 |
2.8%
|
|
2014 | 10 |
7%
|
|
2015 | 19 |
13.4%
|
|
2016 | 10 |
7%
|
|
2017 | 8 |
5.6%
|
|
2018 | 4 |
2.8%
|
|
Sysmiss | 129 |