Year	Number
1996	5
1998	5
2000	6
2002	7
2003	7
2004	8
2005	8
2006	10
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	9
2020	8
2021	7
2022	7