Year	Number
1998	1
2000	2
2002	2
2003	3
2004	3
2005	4
2006	9
2007	10
2008	11
2009	11
2010	11
2011	10
2012	10
2013	10
2014	8
2015	9
2016	9
2017	9
2018	9
2019	8
2020	8
2021	7
2022	7