Year	Number
1996	5
1998	5
2000	7
2002	8
2003	8
2004	8
2005	8
2006	10
2007	10
2008	10
2009	10
2010	10
2011	11
2012	11
2013	11
2014	11
2015	11
2016	10
2017	9
2018	9
2019	9
2020	8
2021	8
2022	8