Year	Number
1970	1415400
1971	1656100
1972	1949800
1973	2247100
1974	2250400
1975	1681300
1976	1650300
1977	1833400
1978	2014400
1979	2264500
1980	1978100
1981	2168500
1982	2272200
1983	2218400
1984	2311800
1985	2315200
1986	2422600
1987	2785600
1988	3025100
1989	3187300
1990	3504500
1991	3571800
1992	4108800
1993	4378900
1994	4359600
1995	4590100
1996	4805500
1997	6281400
1998	7023100
1999	7339300
2000	6721365
2001	6650492
2002	6795580
2003	7590259
2004	9052471
2005	10139655
2006	9440930
2007	10320040
2008	11171020
2009	9903771
2010	10428173.5126738
2011	11014639
2012	11338080
2013	11860998
2014	12635439
2015	12706909
2016	13105120
2017	15937325
2018	17367956
2019	22047878.978
2020	6219531.061
2021	8056494.578