Year	Number
1970	1771600
1971	1958800
1972	1890900
1973	1923200
1974	2194700
1975	2412200
1976	3055300
1977	3188700
1978	3283900
1979	3600900
1980	3876500
1981	4082100
1982	4133500
1983	4210500
1984	4251100
1985	3859300
1986	4160000
1987	4155300
1988	4291800
1989	4305700
1990	4670900
1991	4109300
1992	4436300
1993	4392300
1994	4490400
1995	4168400
1996	4464600
1997	4462000
1998	4508400
1999	4601000
2000	4776260
2001	4640077
2010	11761536.134861983
2011	14168273.53912652
2012	13737452.860048708
2013	14815345
2014	14719339.159067588
2015	12867667
2016	13753911
2017	15919522.079999998
2018	17823482.468118146
2019	18690732.68588695
2020	8026937.252
2021	11917901.427