Year	Number
1996	7
1998	7
2000	8
2002	10
2003	10
2004	13
2005	14
2006	16
2007	16
2008	16
2009	16
2010	17
2011	18
2012	18
2013	17
2014	15
2015	15
2016	13
2017	12
2018	12
2019	13
2020	12
2021	12
2022	12