Year	Number
1996	8
1998	8
2000	9
2002	11
2003	12
2004	13
2005	13
2006	16
2007	17
2008	17
2009	18
2010	18
2011	19
2012	19
2013	18
2014	15
2015	15
2016	15
2017	16
2018	15
2019	14
2020	13
2021	12
2022	12