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