Year	Number
1996	4
1998	4
2000	5
2002	6
2003	7
2004	9
2005	10
2006	12
2007	12
2008	12
2009	12
2010	12
2011	12
2012	13
2013	13
2014	12
2015	12
2016	12
2017	12
2018	12
2019	12
2020	10
2021	10
2022	10