Year	Number
1996	6
1998	6
2000	6
2002	7
2003	7
2004	9
2005	10
2006	11
2007	12
2008	12
2009	12
2010	12
2011	12
2012	12
2013	13
2014	12
2015	13
2016	13
2017	12
2018	12
2019	12
2020	11
2021	12
2022	12