Year	Total
1970	1644000
1971	1602300
1972	1656100
1973	1590500
1974	1453100
1975	1320700
1976	1486500
1977	1747300
1978	2086000
1979	2156200
1980	2436200
1981	2683500
1982	3261500
1983	3379000
1984	3540500
1985	3624400
1986	3708900
1987	3928900
1988	4522300
1989	4530900
1990	4697700
1991	5122500
1992	4950000
1993	5555800
1994	6363100
1995	6831000
1996	7713100
1997	8370100
1998	8370100
1999	10557000
2000	13973000
2001	14902000
2002	17330000
2003	24297000
2004	27181000
2005	29739000
2006	36111000
2007	37980000
2008	37767000
2009	39255000
2010	40278000
2011	38780000
2012	38448000
2013	38557000
2014	37869000
2015	35655000
2016	31033000