Year	Number
1996	9
1998	9
2000	9
2002	10
2003	11
2004	12
2005	12
2006	15
2007	15
2008	15
2009	15
2010	15
2011	15
2012	15
2013	15
2014	14
2015	14
2016	13
2017	13
2018	13
2019	13
2020	12
2021	12
2022	12