Year	Number
1996	3
1998	3
2000	5
2002	6
2003	7
2004	8
2005	8
2006	10
2007	10
2008	9
2009	9
2010	10
2011	10
2012	10
2013	10
2014	10
2015	10
2016	9
2017	9
2018	9
2019	9
2020	8
2021	8
2022	8