Year	US Dollars adjusted for inflation)
1955	759.3
1956	772.7
1957	923.7
1958	804
1959	788.8
1960	819.5
1961	853.7
1962	767.1
1963	802.8
1964	919.6
1965	1081
1966	1045
1967	1134
1968	1104
1969	918.7
1970	1147
1971	1142
1972	1247
1973	1281
1974	1188
1975	1246
1976	1415
1977	1322
1978	1316
1979	1319
1980	1289
1981	1329
1982	1296
1983	1382
1984	1342
1985	1233
1986	1134
1987	1195
1988	1196
1989	1259
1990	1117
1991	1150
1992	1069
1993	1045
1994	935.6
1995	830.8
1996	837.3
1997	854.9
1998	832.3
1999	835.8
2000	865.6
2001	857.9
2002	904.3
2003	945.9