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