Year	Number
1996	7
1998	7
2000	7
2002	7
2003	8
2004	9
2005	9
2006	11
2007	11
2008	11
2009	12
2010	12
2011	13
2012	12
2013	12
2014	12
2015	12
2016	12
2017	12
2018	12
2019	12
2020	11
2021	11
2022	11