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