Year	Number
1970	282300
1971	268200
1972	266300
1973	330000
1974	456500
1975	414100
1976	427200
1977	555000
1978	659000
1979	830200
1980	874300
1981	1017000
1982	1020700
1983	957300
1984	1038500
1985	1116100
1986	1150600
1987	1231400
1988	1176400
1989	1316300
1990	1363100
1991	910700
1992	1029100
1993	1216900
1994	1325400
1995	1310900
1996	1563400
1997	1634700
1998	1749200
1999	1943500
2000	2197521
2001	2023385
2002	2098760
2003	2260849
2004	2546234
2005	2735214
2006	2591666
2007	3133574
2008	3111575
2009	2952885
2010	12477063.1762511
2011	13729553.5346856
2012	12289555.0764284
2013	13926540
2014	16482060
2015	20043787
2016	21399963
2017	26066294
2018	31226848
2019	39803373
2020	14597294
2021	20127200