Year	Number
1996	9
1998	9
2000	11
2002	12
2003	12
2004	12
2005	12
2006	15
2007	15
2008	15
2009	15
2010	15
2011	16
2012	16
2013	15
2014	14
2015	14
2016	12
2017	12
2018	12
2019	12
2020	11
2021	10
2022	9