Year	Number
1996	5
1998	6
2000	7
2002	8
2003	9
2004	9
2005	9
2006	11
2007	12
2008	13
2009	13
2010	13
2011	12
2012	12
2013	12
2014	10
2015	10
2016	10
2017	10
2018	10
2019	9
2020	9
2021	10
2022	10