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