Year	Number
1970	173000
1971	227100
1972	286800
1973	314100
1974	430300
1975	590400
1976	800800
1977	1093900
1978	1441000
1979	1581300
1980	1938500
1981	2300200
1982	2138400
1983	2221300
1984	1945900
1985	2575000
1986	2134000
1987	1614400
1988	995000
1989	848900
1990	964800
1991	930000
1992	646500
1993	608400
1994	664800
1995	547900
1996	221200
1997	318200
1998	313400
1999	419700
2000	507396
2001	519453
2002	520278
2003	520263
2004	540461
2005	747648
2006	1307541
2007	1363435
2008	1460900
2009	1365343
2010	4197375
2011	4793913.27416044
2012	4716148.08073056
2013	4209624
2014	4462001.62973012
2015	4613169
2016	4110075
2017	4789878
2018	7786143.99416227
2019	6539048.35309011
2020	3435350.518
2021	4486313.422