Year	Number
2000	3
2001	2
2002	2
2003	2
2004	2
2005	2
2006	2
2007	2
2008	2
2009	2
2010	1
2011	1
2012	2
2013	1
2014	1
2015	2
2016	1
2017	1
2018	1
2019	1
2020	1