Year	Total
1960	12220000000
1961	13880000000
1962	16060000000
1963	19340000000
1964	21160000000
1965	23890000000
1966	26720000000
1967	29460000000
1968	33100000000
1969	37470000000
1970	57900000000
1971	64940000000
1972	72450000000
1973	78570000000
1974	83650000000
1975	89030000000
1976	95850000000
1977	100700000000
1978	108600000000
1979	111700000000
1980	115000000000
1981	116700000000
1982	118300000000
1983	121800000000
1984	127300000000
1985	132600000000
1986	134400000000
1987	139900000000
1988	136200000000
1989	136300000000
1990	137100000000
1991	122200000000
1992	122800000000
1993	126100000000
1994	124600000000
1995	127200000000
1996	134200000000
1997	130800000000
1998	130500000000
1999	131300000000
2000	130500000000
2001	134000000000
2002	136500000000
2003	139100000000
2004	140400000000
2005	141300000000
2006	141500000000
2007	140100000000
2008	139500000000