Year	Number
1970	1167000
1971	1238100
1972	1285700
1973	1453300
1974	1685700
1975	1987500
1976	2540000
1977	2962100
1978	3543900
1979	3776100
1980	4404900
1981	5147600
1982	5190100
1983	5423600
1984	5311800
1985	5794300
1986	5265300
1987	4485000
1988	3930700
1989	3602400
1990	3551000
1991	3405900
1992	3209800
1993	2840600
1994	3167100
1995	3215200
1996	2855900
1997	3020900
1998	3007600
1999	3083500
2000	2949248
2001	2627404
2002	2072438
2003	2081206
2004	2604956
2010	7817344.202697854
2011	9140452.128598532
2012	9570161.787566964
2013	8677884
2014	8030237.1696505565
2015	8696300
2016	8129874
2017	8837017
2018	12337766.282300504
2019	11384912.635031302
2020	5328945.184
2021	7425487.428