Year	Number
1970	3010200
1971	2959700
1972	2963600
1973	3147300
1974	3118000
1975	3376100
1976	3730000
1977	4117300
1978	4747100
1979	5052400
1980	4808200
1981	4570100
1982	6701500
1983	6583900
1984	5737400
1985	5737300
1986	5731300
1987	5598500
1988	5460000
1989	5565100
1990	5266700
1991	5539900
1992	6232100
1993	6930200
1994	7686500
1995	7863300
1996	8342100
1997	9188900
1998	9289700
1999	8619200
2000	8568734
2001	9604390
2002	9424850
2003	9142585
2004	8829094
2005	9984424
2006	10616356
2007	11630594
2008	12338706
2009	12115330
2010	16932435
2011	18768534.7701547
2012	22012458.8443775
2013	26929238
2014	28675159
2015	30909723
2016	32262658
2017	32504898
2018	33704037
2019	37031843
2020	12273939.724
2021	26167360