Year	US Dollars adjusted for inflation)
1960	831.1
1961	835.3
1962	890.6
1963	898.3
1964	908.6
1965	901.4
1966	889.1
1967	974.9
1968	998
1969	1038
1970	1002
1971	1050
1972	1071
1973	1090
1974	1126
1975	1143
1976	1169
1977	1130
1978	1108
1979	1107
1980	1133
1981	1144
1982	1089
1983	1010
1984	950.7
1985	834.3
1986	844.3
1987	919.1
1988	1016
1989	1098
1990	1115
1991	1091
1992	988.9
1993	1039
1994	1079
1995	893.1
1996	931.5
1997	1020
1998	1096
1999	1048
2000	1093
2001	1254
2002	1317
2003	1451