Year	Number
2000	1
2001	2
2002	1
2003	0
2004	1
2005	1
2006	1
2007	1
2008	2
2009	2
2010	0
2011	1
2012	1
2013	2
2014	2
2015	0
2016	2
2017	0
2018	0
2019	2
2020	2