Year	Number
1996	7
1998	7
2000	10
2002	11
2003	11
2004	11
2005	11
2006	15
2007	15
2008	15
2009	15
2010	16
2011	17
2012	17
2013	16
2014	15
2015	15
2016	13
2017	13
2018	13
2019	13
2020	12
2021	12
2022	12