Year	Number of
2000	1
2001	1
2002	2
2003	2
2004	7
2005	6
2006	4
2007	3
2008	3
2009	2
2010	1
2011	1
2012	1
2013	6
2014	3
2015	3
2016	3
2017	2
2018	3
2019	3
2020	2