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