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