Year	Number
1996	4
1998	4
2000	5
2002	5
2003	7
2004	8
2005	10
2006	12
2007	13
2008	13
2009	13
2010	13
2011	13
2012	14
2013	14
2014	13
2015	13
2016	12
2017	12
2018	10
2019	10
2020	9
2021	9
2022	10