Year	US Dollars adjusted for inflation)
1960	760.5
1961	680.1
1962	635.3
1963	805
1964	729.1
1965	898.3
1966	919.7
1967	890.3
1968	914.9
1969	904.2
1970	923.2
1971	899
1972	874.1
1973	922.7
1974	943.5
1975	1014
1976	995.3
1977	1012
1978	935.1
1979	872.8
1980	887.8
1981	894.2
1982	974.2
1983	964.2
1984	928.1
1985	904.1
1986	934.7
1987	914
1988	918.6
1989	919.4
1990	912.5
1991	890.3
1992	889.9
1993	871.7
1994	829.5
1995	772.7
1996	787.4
1997	787.6
1998	834.1
1999	925.5
2000	953.9
2001	963.2
2002	890.6
2003	937.4