Year	US Dollars adjusted for inflation)
1960	817.6
1961	799.4
1962	809.5
1963	797.6
1964	845.7
1965	831.4
1966	879.8
1967	847
1968	834.9
1969	864.6
1970	882.3
1971	861.4
1972	877.9
1973	853.6
1974	876
1975	900.5
1976	894.3
1977	910.3
1978	949.5
1979	952.9
1980	872.1
1981	928.8
1982	964.5
1983	931.5
1984	985.1
1985	1019
1986	1036
1987	1024
1988	1074
1989	1114
1990	1110
1991	1159
1992	1152
1993	1180
1994	1235
1995	1269
1996	1301
1997	1332
1998	1335
1999	1381
2000	1421
2001	1477
2002	1435
2003	1441