Year	Number of
2000	32000
2001	31000
2002	33000
2003	34000
2004	33000
2005	34000
2006	31000
2007	28000
2008	28000
2009	26000
2010	24000
2011	23000
2012	21000
2013	19000
2014	17000
2015	15000
2016	14000
2017	12000
2018	11000
2019	9500
2020	9000