Year	Total
1965	6478000
1966	6257000
1967	5581000
1968	8577000
1969	12295000
1970	16404000
1971	14952000
1972	10720000
1973	8479000
1974	7453000
1975	11734000
1976	16610000
1977	20900000
1978	25190000
1979	26140000
1980	29780000
1981	32152000
1982	33314000
1983	36430000
1984	41836000
1985	45067000
1986	41135000
1987	46249000
1988	44234000
1989	44521000
1990	45499000
1991	45418000
1992	45985000
1993	47527000
1994	46497000
1995	46588000
1996	45080000
1997	43792000
1998	42962000
1999	41361000
2000	38917000
2001	37600000
2002	37241000
2003	37072000
2004	34841000
2005	33167000
2006	33162000
2007	33810000
2008	34654000
2009	35260000
2010	35030000
2011	34599000
2012	34726000
2013	34361000
2014	35140000
2015	35431000
2016	33835000