Year	Number
1996	4
1998	4
2000	4
2002	6
2003	7
2004	8
2005	8
2006	8
2007	9
2008	8
2009	10
2010	10
2011	10
2012	9
2013	10
2014	10
2015	12
2016	12
2017	11
2018	11
2019	11
2020	10
2021	10
2022	10