Year	Number
2000	0
2001	2
2002	3
2003	1
2004	2
2005	0
2006	1
2007	5
2008	6
2009	5
2010	2
2011	1
2012	2
2013	0
2014	8
2015	2
2016	0
2017	1
2018	0
2019	2
2020	2