Year	Number of
2000	4
2001	6
2002	4
2003	5
2004	2
2005	2
2006	1
2007	2
2008	2
2009	2
2010	1
2011	2
2012	1
2013	1
2014	1
2015	1
2016	1
2017	3
2018	3
2019	2
2020	2