Year	US Dollars adjusted for inflation)
1960	1797
1961	1714
1962	1699
1963	1653
1964	1635
1965	1638
1966	1653
1967	1571
1968	1621
1969	1443
1970	1496
1971	1457
1972	1459
1973	1362
1974	1388
1975	1449
1976	1570
1977	1466
1978	1428
1979	1480
1980	1414
1981	1351
1982	1518
1983	1513
1984	1391
1985	1467
1986	1459
1987	1475
1988	1520
1989	1457
1990	1441
1991	1412
1992	1385
1993	1329
1994	1353
1995	1330
1996	1347
1997	1415
1998	1411
1999	1492
2000	1571
2001	1390
2002	1371
2003	1407