Year	Total
1960	8134000000
1961	8454000000
1962	9530000000
1963	10340000000
1964	10960000000
1965	11800000000
1966	12790000000
1967	13070000000
1968	14540000000
1969	14330000000
1970	14970000000
1971	14690000000
1972	15340000000
1973	15960000000
1974	16700000000
1975	17650000000
1976	18930000000
1977	20380000000
1978	20940000000
1979	22350000000
1980	22530000000
1981	23880000000
1982	25080000000
1983	25780000000
1984	28220000000
1985	28920000000
1986	29930000000
1987	30220000000
1988	29300000000
1989	28870000000
1990	30300000000
1991	32620000000
1992	32660000000
1993	32790000000
1994	34020000000
1995	34630000000
1996	35290000000
1997	33980000000
1998	35050000000
1999	35050000000
2000	34650000000
2001	35880000000
2002	34650000000
2003	32030000000
2004	32410000000
2005	34010000000
2006	33650000000
2007	34950000000
2008	34520000000