Year	Number
1996	2
1998	3
2000	3
2002	5
2003	5
2004	6
2005	9
2006	10
2007	10
2008	10
2009	10
2010	10
2011	10
2012	10
2013	9
2014	10
2015	10
2016	10
2017	8
2018	8
2019	9
2020	8
2021	8
2022	7