Year	Number
1970	1476300
1971	1544200
1972	1408800
1973	1496300
1974	1474600
1975	1475700
1976	1578100
1977	1675600
1978	1781300
1979	2022500
1980	1830200
1981	1978600
1982	1949100
1983	1780800
1984	1838500
1985	1828800
1986	1972000
1987	2279000
1988	3675600
1989	4376300
1990	4812300
1991	4764600
1992	5006000
1993	4650400
1994	4825700
1995	6586500
1996	7676800
1997	8963700
1998	10401200
1999	11948800
2000	13983022
2001	15450847
2002	19728801
2003	28863657
2004	34748853
2005	42872544
2006	50737809
2007	60099058
2008	69447262
2009	77747207
2010	84784226
2011	89956333.5096866
2012	92637189.1903926
2013	93408036
2014	98449140
2015	115928738
2016	134065078
2017	153944513
2018	167598633
2019	170161848
2020	54582262
2021	74065210