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