Year	Number
1970	3397400
1971	3926200
1972	4054100
1973	4514400
1974	4575000
1975	4691800
1976	5084900
1977	5437100
1978	5686800
1979	5887400
1980	5930100
1981	6220600
1982	6252200
1983	6266800
1984	6254500
1985	6506200
1986	6707800
1987	7213900
1988	7483500
1989	8229500
1990	8603400
1991	7973600
1992	8255700
1993	9152000
1994	9338200
1995	9859000
1996	10468300
1997	12481600
1998	14298900
1999	16209000
2000	17268093
2001	16914823
2002	13295500
2003	10118096
2004	9287315
2005	9662619
2006	10647142
2007	12298456
2008	14352757
2009	14701206
2010	22146864
2011	24866065
2012	26386306.6034666
2013	27503416
2014	27923164
2015	27011762
2016	25859918
2017	26732570
2018	28857994
2019	30339654
2020	9009607.2
2021	10988881.272