Year	Number
1996	3
1998	3
2000	3
2002	3
2003	5
2004	7
2005	9
2006	12
2007	12
2008	12
2009	12
2010	13
2011	13
2012	15
2013	16
2014	15
2015	15
2016	15
2017	15
2018	14
2019	14
2020	12
2021	11
2022	11