Year	Number
1996	5
1998	6
2000	7
2002	9
2003	9
2004	10
2005	12
2006	14
2007	14
2008	14
2009	15
2010	15
2011	15
2012	15
2013	14
2014	12
2015	12
2016	12
2017	12
2018	12
2019	11
2020	10
2021	9
2022	9