Year	Number
1996	8
1998	8
2000	9
2002	10
2003	10
2004	12
2005	12
2006	14
2007	15
2008	15
2009	15
2010	14
2011	15
2012	15
2013	15
2014	13
2015	13
2016	12
2017	11
2018	11
2019	11
2020	10
2021	10
2022	10