Year	Number
1996	6
1998	6
2000	7
2002	9
2003	9
2004	9
2005	9
2006	9
2007	9
2008	9
2009	10
2010	10
2011	10
2012	10
2013	10
2014	10
2015	10
2016	9
2017	8
2018	8
2019	8
2020	7
2021	8
2022	8