Year	Number
1996	3
1998	3
2000	3
2002	4
2003	4
2004	6
2005	7
2006	7
2007	8
2008	8
2009	9
2010	9
2011	9
2012	9
2013	10
2014	10
2015	10
2016	10
2017	10
2018	10
2019	10
2020	9
2021	9
2022	9