Year	Number
1996	7
1998	7
2000	8
2002	9
2003	9
2004	9
2005	10
2006	12
2007	12
2008	12
2009	12
2010	12
2011	13
2012	13
2013	13
2014	11
2015	11
2016	11
2017	11
2018	11
2019	10
2020	9
2021	9
2022	9