Year	Number
2000	980
2001	960
2002	990
2003	1100
2004	900
2005	900
2006	940
2007	970
2008	950
2009	970
2010	970
2011	1000
2012	1000
2013	1000
2014	1200
2015	1100
2016	1000
2017	1100
2018	1100
2019	1100
2020	1100