Year	Number
1996	4
1998	4
2000	5
2002	7
2003	7
2004	8
2005	9
2006	12
2007	13
2008	13
2009	13
2010	12
2011	13
2012	14
2013	15
2014	12
2015	11
2016	12
2017	11
2018	11
2019	10
2020	9
2021	9
2022	9