Year	Number
1996	4
1998	3
2000	4
2002	6
2003	6
2004	7
2005	8
2006	10
2007	10
2008	10
2009	10
2010	10
2011	10
2012	10
2013	10
2014	10
2015	10
2016	9
2017	8
2018	8
2019	9
2020	8
2021	8
2022	8