Year	Number
1996	2
1998	2
2000	2
2002	2
2003	2
2004	4
2005	5
2006	7
2007	8
2008	8
2009	8
2010	8
2011	8
2012	8
2013	8
2014	8
2015	8
2016	8
2017	7
2018	7
2019	7
2020	7
2021	8
2022	8