Year	Number
1996	5
1998	4
2000	4
2002	6
2003	6
2004	7
2005	7
2006	9
2007	9
2008	10
2009	10
2010	10
2011	10
2012	10
2013	10
2014	10
2015	10
2016	10
2017	10
2018	10
2019	10
2020	9
2021	8
2022	8