Year of reporting	Count
1995	1
1996	4
1997	3
1998	4
1999	8
2000	4
2001	3
2002	6
2003	2
2004	3
2005	5
2008	6
2009	2
2010	8
2011	2
2012	1
2013	3
2014	2
2016	2

Statistics by the author: Švihlová Dana