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