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