Year	Total
1960	3561000000
1961	3681000000
1962	3921000000
1963	4021000000
1964	4712000000
1965	5719000000
1966	6535000000
1967	7474000000
1968	8616000000
1969	8707000000
1970	11380000000
1971	13210000000
1972	14850000000
1973	15750000000
1974	15320000000
1975	17340000000
1976	20090000000
1977	21430000000
1978	22550000000
1979	24190000000
1980	25720000000
1981	27220000000
1982	29200000000
1983	31540000000
1984	33710000000
1985	39730000000
1986	39920000000
1987	40660000000
1988	38620000000
1989	38000000000
1990	38100000000
1991	41200000000
1992	40220000000
1993	41840000000
1994	42520000000
1995	42400000000
1996	43330000000
1997	42580000000
1998	42500000000
1999	40170000000
2000	42030000000
2001	42190000000
2002	41480000000
2003	42010000000
2004	41380000000
2005	42670000000
2006	41500000000
2007	39650000000
2008	38940000000