Year	Number
1998	1
2000	1
2002	1
2003	2
2004	2
2005	3
2006	5
2007	6
2008	8
2009	8
2010	9
2011	8
2012	8
2013	8
2014	8
2015	9
2016	9
2017	9
2018	9
2019	9
2020	8
2021	7
2022	7