Year	Number of
2000	9
2001	6
2002	6
2003	4
2004	6
2005	4
2006	5
2007	4
2008	5
2009	5
2010	5
2011	5
2012	4
2013	4
2014	3
2015	5
2016	4
2017	3
2018	3
2019	2
2020	2