Year	Number
1996	7
1998	7
2000	8
2002	9
2003	9
2004	9
2005	9
2006	12
2007	13
2008	13
2009	13
2010	13
2011	14
2012	14
2013	13
2014	11
2015	11
2016	12
2017	12
2018	12
2019	11
2020	10
2021	10
2022	10