Year	Total
1970	5418000
1971	5653200
1972	5554200
1973	5747700
1974	5679700
1975	6449100
1976	6644200
1977	6720700
1978	6367800
1979	7488600
1980	8548000
1981	8545400
1982	9272700
1983	10619000
1984	11520000
1985	11952000
1986	14001000
1987	14284000
1988	16889000
1989	17976000
1990	17016000
1991	18240000
1992	18891000
1993	18946000
1994	19557000
1995	21577000
1996	23836000
1997	24973000
1998	26954000
1999	30759000
2000	34322000
2001	34226000
2002	33712000
2003	37620000
2004	40392000
2005	41067000
2006	41490000
2007	40347000
2008	39654000
2009	37283000
2010	36089000
2011	34906000
2012	33956000
2013	31980000
2014	31907000
2015	32842000
2016	34443000