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