Year	Number of
2000	0
2001	0
2002	2
2003	2
2004	1
2005	1
2006	1
2007	0
2008	1
2009	1
2010	0
2011	0
2012	0
2013	0
2014	0
2015	0
2016	0
2017	0
2018	0
2019	0
2020	0