Year	Number
1996	4
1998	4
2000	4
2002	4
2003	4
2004	5
2005	7
2006	7
2007	7
2008	8
2009	8
2010	8
2011	8
2012	8
2013	8
2014	8
2015	8
2016	8
2017	8
2018	8
2019	8
2020	8
2021	8
2022	8