Year	Number
1996	5
1998	6
2000	8
2002	10
2003	10
2004	10
2005	10
2006	12
2007	15
2008	15
2009	15
2010	15
2011	16
2012	16
2013	15
2014	13
2015	13
2016	13
2017	13
2018	13
2019	12
2020	11
2021	10
2022	10