Year	Number
1996	6
1998	6
2000	7
2002	8
2003	8
2004	9
2005	9
2006	10
2007	10
2008	10
2009	10
2010	10
2011	11
2012	12
2013	15
2014	14
2015	14
2016	12
2017	12
2018	12
2019	12
2020	11
2021	10
2022	9