Year	Number
2000	2
2001	1
2002	22
2003	20
2004	13
2005	8
2006	7
2007	2
2008	6
2009	10
2010	6
2011	2
2012	3
2013	2
2014	0
2015	0
2016	0
2017	0
2018	0
2019	1
2020	0