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