Year	Number
2000	14
2001	12
2002	12
2003	12
2004	11
2005	11
2006	10
2007	10
2008	10
2009	10
2010	10
2011	10
2012	10
2013	9
2014	9
2015	9
2016	8
2017	8
2018	8
2019	7
2020	7