Year	US Dollars adjusted for inflation)
1960	1348
1961	1445
1962	1459
1963	1726
1964	1751
1965	1530
1966	1670
1967	1859
1968	1979
1969	1893
1970	1660
1971	1651
1972	1810
1973	1639
1974	1645
1975	1924
1976	1857
1977	1764
1978	1784
1979	1872
1980	1888
1981	1939
1982	2011
1983	1995
1984	1910
1985	2019
1986	2087
1987	2061
1988	2102
1989	2045
1990	1973
1991	1965
1992	1863
1993	1854
1994	1796
1995	1664
1996	1642
1997	1576
1998	1499
1999	1436
2000	1359
2001	1358
2002	1354
2003	1278