Year	Number
1996	6
1998	6
2000	7
2002	9
2003	10
2004	10
2005	10
2006	12
2007	13
2008	13
2009	14
2010	14
2011	14
2012	15
2013	14
2014	12
2015	12
2016	12
2017	12
2018	12
2019	11
2020	10
2021	10
2022	10