Year	Number
2000	2100
2001	2100
2002	2100
2003	2200
2004	2100
2005	2100
2006	2100
2007	2100
2008	2100
2009	2200
2010	2100
2011	2100
2012	2000
2013	2000
2014	1900
2015	1800
2016	1800
2017	1900
2018	1900
2019	1900
2020	1900