Year	Number
1996	4
1998	4
2000	5
2002	8
2003	8
2004	10
2005	10
2006	11
2007	13
2008	13
2009	13
2010	13
2011	12
2012	15
2013	14
2014	11
2015	12
2016	12
2017	12
2018	12
2019	11
2020	10
2021	9
2022	9