Year	Number
1996	2
1998	2
2000	2
2002	2
2003	3
2004	5
2005	6
2006	9
2007	10
2008	10
2009	10
2010	10
2011	11
2012	12
2013	13
2014	12
2015	12
2016	12
2017	11
2018	10
2019	10
2020	9
2021	8
2022	8