Year	Number
1996	4
1998	4
2000	4
2002	4
2003	5
2004	7
2005	8
2006	9
2007	10
2008	10
2009	10
2010	11
2011	11
2012	11
2013	12
2014	12
2015	12
2016	12
2017	12
2018	12
2019	12
2020	11
2021	12
2022	11