Year	Number
1998	49900
1999	60100
2000	69142
2001	64993
2002	65643
2003	72864
2008	56313
2009	79977
2010	56485.161815801
2011	40182.4397667535
2012	24874.0896320184
2013	15000
2014	36636
2015	7071
2019	5375
2020	1593