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	11
2017	12
2018	12
2019	11
2020	10
2021	10
2022	10