Year	Number
1970	220000
1971	228000
1972	224700
1973	228200
1974	220100
1975	253200
1976	281800
1977	262600
1978	276000
1979	301000
1980	321400
1981	334600
1982	323400
1983	329300
1984	326600
1985	334200
1986	304800
1987	306600
1988	300500
1989	311500
1990	317100
1991	321900
1992	302300
1993	302700
1994	303500
1995	278900
1996	293600
1997	337600
1998	332300
1999	337800
2000	354035
2001	349026
2002	320253
2003	338510
2004	356660
2005	380427
2006	378262
2007	421479
2008	366757
2009	373213
2010	591685.6200196507
2011	638799.4444942056
2012	661095.2497254368
2013	703872.772
2014	680337.1268037994
2015	720955
2016	720715
2017	781350
2018	862254.2111460221
2019	876670.0900000001
2020	378675.5464
2021	534427.861