Year	Number of
2000	2
2001	3
2002	4
2003	7
2004	4
2005	3
2006	3
2007	5
2008	2
2009	8
2010	4
2011	3
2012	3
2013	2
2014	2
2015	2
2016	2
2017	2
2018	2
2019	2
2020	2