Year	Total
1960	12680000
1961	13200000
1962	14680000
1963	14420000
1964	15370000
1965	16850000
1966	16930000
1967	19280000
1968	19280000
1969	21710000
1970	21540000
1971	22660000
1972	23300000
1973	22820000
1974	26150000
1975	26060000
1976	24640000
1977	19140000
1978	24350000
1979	24300000
1980	23970000
1981	22640000
1982	26850000
1983	28840000
1984	27890000
1985	24420000
1986	25260000
1987	20370000
1988	17920000
1989	22030000
1990	23490000
1991	24780000
1992	21870000
1993	24360000
1994	22590000
1995	27010000
1996	30170000
1997	28650000
1998	25460000
1999	23900000
2000	21770000
2001	16190000
2002	22960000
2003	23960000
2004	23310000
2005	23430000
2006	25100000
2007	21460000
2008	22070000
2009	23700000
2010	22550000
2011	28180000