Year	Number
1996	4
1998	4
2000	5
2002	8
2003	8
2004	8
2005	8
2006	9
2007	9
2008	9
2009	10
2010	10
2011	11
2012	12
2013	12
2014	10
2015	9
2016	9
2017	9
2018	9
2019	9
2020	7
2021	8
2022	9