Year of reporting	Count
1987	1
1988	1
1989	2
1990	1
1991	2
1993	2
1994	1
1995	1
1996	1
1998	2
1999	2
2000	1
2001	1
2003	1
2004	2
2005	2
2007	2
2010	1
2012	1
2013	1
2018	2

Statistics by the author: Hrnčiar Pavel