Year	Number
1996	7
1998	7
2000	8
2002	9
2003	9
2004	9
2005	9
2006	10
2007	10
2008	10
2009	11
2010	11
2011	12
2012	12
2013	12
2014	10
2015	10
2016	10
2017	11
2018	11
2019	10
2020	9
2021	9
2022	9