Year	Number
1970	2671600
1971	2554000
1972	3285800
1973	3391600
1974	3037300
1975	3839900
1976	4534000
1977	5147500
1978	6099600
1979	6546800
1980	6603100
1981	7574500
1982	8391700
1983	9164800
1984	10125700
1985	10993800
1986	11785200
1987	12668600
1988	12863100
1989	12740100
1990	10862200
1991	10717400
1992	11127100
1993	9441600
1994	11518400
1995	14260600
1996	13394600
1997	16039800
1998	16521000
1999	16005400
2000	17299483
2001	16862737
2002	17633019
2003	19455085
2004	23934074
2005	27879461
2006	40288794
2007	51897450
2008	49877935
2009	54446373
2010	64374253.8038964
2011	73996912
2012	72151828.8895485
2013	75589071
2014	82718882.88
2015	98927860
2016	119577835
2017	139752424
2018	164035637.545
2019	167499116
2020	68959633
2021	83964797