Year	Number of
2000	19
2001	13
2002	9
2003	6
2004	12
2005	8
2006	9
2007	6
2008	8
2009	5
2010	5
2011	8
2012	3
2013	4
2014	5
2015	6
2016	10
2017	6
2018	4
2019	5
2020	4