Year	Number
2000	30
2001	26
2002	23
2003	21
2004	19
2005	18
2006	16
2007	15
2008	14
2009	12
2010	11
2011	10
2012	9
2013	9
2014	8
2015	8
2016	8
2017	8
2018	7
2019	7
2020	7