Year	Number
1970	2881100
1971	3012300
1972	3275800
1973	3682400
1974	3627100
1975	3827700
1976	4080900
1977	4452000
1978	4718300
1979	4918900
1980	4983800
1981	5058000
1982	5201900
1983	5278900
1984	5654900
1985	6027700
1986	6382000
1987	7403400
1988	7860100
1989	8253400
1990	8559400
1991	8893200
1992	10087800
1993	11774600
1994	12894800
1995	16377900
1996	17114300
1997	17889900
1998	18675500
1999	19741200
2000	20898713
2001	20072980
2002	22931166
2003	23454932
2004	25595676
2005	26132696
2006	27454451
2007	28857440
2008	29601230
2009	29108547
2010	26979676.6296817
2011	29959476.4043769
2012	31672223.9759589
2013	33455251
2014	33956338
2015	35687843
2016	40078714
2017	42763443
2018	44417573.579144
2019	46358457.951
2020	14748517.334
2021	19349165.526