Year	Number
1996	4
1998	4
2000	4
2002	5
2003	7
2004	8
2005	10
2006	13
2007	14
2008	14
2009	13
2010	14
2011	15
2012	15
2013	16
2014	15
2015	15
2016	15
2017	15
2018	15
2019	15
2020	14
2021	13
2022	13