Year	Number of
2000	1400
2001	1400
2002	1300
2003	1400
2004	1800
2005	1000
2006	1000
2007	1000
2008	1100
2009	1100
2010	980
2011	900
2012	790
2013	800
2014	730
2015	740
2016	740
2017	750
2018	760
2019	760
2020	770