Year	Number
1970	298600
1971	294600
1972	277400
1973	313700
1974	298000
1975	350900
1976	380900
1977	354500
1978	371700
1979	389800
1980	424700
1981	426700
1982	410300
1983	417900
1984	460300
1985	467200
1986	459800
1987	467000
1988	488600
1989	486000
1990	484700
1991	471100
1992	462600
1993	419800
1994	472400
1995	436800
1996	448000
1997	514100
1998	525500
1999	489200
2000	488371
2001	476764
2002	409497
2003	404867
2004	446038
2005	456226
2006	474783
2007	516809
2008	475322
2009	489833
2010	751083.9064857541
2011	846763.0595934679
2012	865954.3973417714
2013	947303.2152386172
2014	1019407.6039901314
2015	1044592
2016	1067058
2017	1166134
2018	1207023.6200312218
2019	1188184.09
2020	663178.1504
2021	747450.863