Year	US Dollars adjusted for inflation)
1950	713.2
1951	748.6
1952	792.3
1953	791.2
1954	835.9
1955	857.6
1956	827.3
1957	834.9
1958	876.7
1959	907.1
1960	1096
1961	1021
1962	1022
1963	1076
1964	1100
1965	1021
1966	932.6
1967	786.7
1968	787.2
1969	917.7
1970	1031
1971	1087
1972	1116
1973	1132
1974	1260
1975	1189
1976	1227
1977	1319
1978	1264
1979	1069
1980	987.2
1981	1040
1982	1012
1983	955.8
1984	896.6
1985	953.2
1986	948.2
1987	915.3
1988	978.5
1989	1013
1990	1060
1991	1080
1992	1082
1993	1080
1994	1061
1995	946.2
1996	1047
1997	1045
1998	1040
1999	1056
2000	1074
2001	1071
2002	1089
2003	1223
2004	1210