Year	Total
1965	346210
1966	445120
1967	1038600
1968	1934100
1969	2225600
1970	8704600
1971	15255000
1972	16280000
1973	20394000
1974	20179000
1975	21622000
1976	22141000
1977	23425000
1978	23191000
1979	23276000
1980	21839000
1981	21271000
1982	20974000
1983	20417000
1984	26483000
1985	30683000
1986	27413000
1987	29138000
1988	27653000
1989	26082000
1990	30275000
1991	28613000
1992	28198000
1993	26302000
1994	28318000
1995	26665000
1996	28066000
1997	29788000
1998	28205000
1999	27472000
2000	37092000
2001	34321000
2002	34107000
2003	29523000
2004	25783000
2005	25327000
2006	23510000
2007	24473000
2008	24127000
2009	22374000
2010	24530000
2011	21528000
2012	21383000
2013	17809000
2014	19095000
2015	17417000
2016	15533000