Year	Total
1960	6411000000
1961	7061000000
1962	8074000000
1963	9431000000
1964	10740000000
1965	12160000000
1966	13310000000
1967	14510000000
1968	15870000000
1969	17590000000
1970	19400000000
1971	22990000000
1972	24330000000
1973	26290000000
1974	27340000000
1975	27700000000
1976	29960000000
1977	31670000000
1978	34200000000
1979	36390000000
1980	37840000000
1981	38860000000
1982	41080000000
1983	41040000000
1984	43410000000
1985	44510000000
1986	45700000000
1987	48140000000
1988	49270000000
1989	50990000000
1990	52740000000
1991	54690000000
1992	55750000000
1993	56420000000
1994	57030000000
1995	57250000000
1996	58010000000
1997	58500000000
1998	59290000000
1999	60730000000
2000	61120000000
2001	61560000000
2002	62970000000
2003	65030000000
2004	66600000000
2005	66970000000
2006	67650000000
2007	67230000000
2008	68400000000