Year	Number
1970	10180300
1971	10247300
1972	11628500
1973	14626800
1974	16367500
1975	16712900
1976	16833100
1977	17466400
1978	18472000
1979	20846400
1980	22453000
1981	22097100
1982	19653800
1983	18107900
1984	19382600
1985	19688400
1986	20378500
1987	19946500
1988	22379400
1989	21273800
1990	20601400
1991	16586500
1992	16818300
1993	17516500
1994	18104800
1995	20291100
1996	22856000
1997	23981500
1998	24653300
1999	24602000
2000	41767974
2001	40451914
2002	23323029
2003	35884417
2004	40701307
2005	45229860
2006	46726978
2007	52103547
2008	53718757
2009	52583516
2010	63277409.3753385
2011	66078011.9547392
2012	70467400.7928687
2013	71526725.918431
2014	75528607
2015	80228302
2016	85406425
2017	91404001
2018	91504000
2019	93352000
2020	27620000
2021	24951000