Year	Number
1996	4
1998	5
2000	7
2002	8
2003	8
2004	8
2005	8
2006	9
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	8
2020	7
2021	8
2022	8