Year	US Dollars adjusted for inflation)
1960	1126
1961	1142
1962	1284
1963	1152
1964	1139
1965	1165
1966	1069
1967	990.3
1968	967.7
1969	956
1970	991.2
1971	990.4
1972	900
1973	832.3
1974	900.4
1975	992.3
1976	955.3
1977	874.5
1978	854.5
1979	664.6
1980	624.8
1981	616.8
1982	619.3
1983	688.7
1984	718.4
1985	867.2
1986	834.6
1987	787.2
1988	880.9
1989	899.2
1990	833.6
1991	874
1992	901.9
1993	876.6
1994	859.5
1995	899.2
1996	849.3
1997	831.1
1998	873.7
1999	881.3
2000	829.5
2001	755.7
2002	717
2003	883.5