Year	Number
1996	6
1998	6
2000	7
2002	8
2003	8
2004	9
2005	9
2006	10
2007	10
2008	10
2009	11
2010	11
2011	12
2012	12
2013	12
2014	12
2015	12
2016	11
2017	9
2018	9
2019	10
2020	9
2021	8
2022	8