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