Year	Total
1965	41370000
1966	38333000
1967	37837000
1968	36385000
1969	36423000
1970	34666000
1971	31766000
1972	28256000
1973	27949000
1974	28289000
1975	24802000
1976	29160000
1977	28085000
1978	29302000
1979	31823000
1980	31157000
1981	28400000
1982	29040000
1983	26280000
1984	25130000
1985	24390000
1986	20160000
1987	18350000
1988	17920000
1989	19510000
1990	18990000
1991	20210000
1992	17820000
1993	14560000
1994	14320000
1995	14660000
1996	15620000
1997	13680000
1998	16270000
1999	14570000
2000	14167000
2001	12398000
2002	12778000
2003	13584000
2004	12931000
2005	13429000
2006	12409000
2007	12847000
2008	12073000
2009	10750000
2010	11511000
2011	9768400
2012	11066000
2013	11564000
2014	8637000
2015	8383700
2016	8315500