Year	US Dollars adjusted for inflation)
1950	846.8
1951	903.1
1952	947.4
1953	860
1954	834
1955	846.2
1956	873.5
1957	908
1958	854.2
1959	890.7
1960	873.9
1961	813.6
1962	878.1
1963	922.6
1964	925
1965	939.6
1966	985.2
1967	1019
1968	1030
1969	1059
1970	1059
1971	1024
1972	1067
1973	1076
1974	1040
1975	1034
1976	1018
1977	1020
1978	972.5
1979	786.5
1980	749.5
1981	665.9
1982	703.4
1983	740.6
1984	733.6
1985	681.4
1986	673.6
1987	646.6
1988	644.9
1989	672.5
1990	709.3
1991	729.4
1992	735.9
1993	770.9
1994	898.5
1995	863.8
1996	908.5
1997	950.1
1998	977.4
1999	1032
2000	1058
2001	1076
2002	1093
2003	1114