Year	Number
1996	1
1998	1
2000	1
2002	2
2003	2
2004	4
2005	6
2006	7
2007	7
2008	7
2009	9
2010	9
2011	9
2012	9
2013	9
2014	9
2015	9
2016	9
2017	9
2018	9
2019	9
2020	8
2021	8
2022	8