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