Year	Number
1996	7
1998	7
2000	8
2002	9
2003	9
2004	9
2005	9
2006	11
2007	12
2008	12
2009	13
2010	14
2011	15
2012	15
2013	14
2014	11
2015	11
2016	11
2017	12
2018	12
2019	11
2020	10
2021	10
2022	10