Year	Total
1960	16480000000
1961	18740000000
1962	19070000000
1963	20070000000
1964	22760000000
1965	25510000000
1966	30040000000
1967	31940000000
1968	34540000000
1969	38480000000
1970	42830000000
1971	49150000000
1972	47970000000
1973	51960000000
1974	59310000000
1975	64140000000
1976	70820000000
1977	76620000000
1978	78940000000
1979	80210000000
1980	84840000000
1981	87260000000
1982	90890000000
1983	95880000000
1984	100500000000
1985	103700000000
1986	109100000000
1987	111600000000
1988	120600000000
1989	129900000000
1990	129900000000
1991	129400000000
1992	132300000000
1993	132400000000
1994	132900000000
1995	131600000000
1996	135300000000
1997	134500000000
1998	129300000000
1999	133300000000
2000	138300000000
2001	140300000000
2002	142700000000
2003	148000000000
2004	151000000000
2005	151000000000
2006	147000000000
2007	152900000000
2008	160700000000