Year	Number
1996	7
1998	7
2000	9
2002	12
2003	12
2004	13
2005	16
2006	19
2007	19
2008	18
2009	19
2010	19
2011	20
2012	20
2013	20
2014	16
2015	16
2016	16
2017	16
2018	16
2019	15
2020	14
2021	13
2022	13