Year	US Dollars adjusted for inflation)
1960	838.2
1961	922.9
1962	901.6
1963	921.4
1964	958.1
1965	1027
1966	1168
1967	1237
1968	1293
1969	1352
1970	1302
1971	1376
1972	1403
1973	1287
1974	1316
1975	1282
1976	1321
1977	1291
1978	1310
1979	1351
1980	1314
1981	1104
1982	1067
1983	977.4
1984	1029
1985	932.6
1986	869.7
1987	869.7
1988	902.2
1989	920.1
1990	906.7
1991	890.6
1992	826
1993	815
1994	883.9
1995	898.4
1996	878.7
1997	874.2
1998	909.8
1999	868.8
2000	823.2
2001	784
2002	731.4
2003	788.5
2004	773.7