Year	Number
1996	4
1998	4
2000	4
2002	5
2003	6
2004	8
2005	9
2006	10
2007	10
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	8
2021	9
2022	9