Year	Number
1996	2
1998	2
2000	2
2002	2
2003	3
2004	5
2005	7
2006	8
2007	8
2008	9
2009	10
2010	10
2011	10
2012	10
2013	11
2014	10
2015	9
2016	9
2017	9
2018	9
2019	9
2020	8
2021	8
2022	8