Year	US Dollars adjusted for inflation)
1960	596.9
1961	609.8
1962	662.9
1963	694.7
1964	721
1965	727.3
1966	688.6
1967	761.9
1968	733.2
1969	724.2
1970	712.1
1971	718.7
1972	725.8
1973	878.5
1974	920.2
1975	798.4
1976	836.3
1977	941
1978	1203
1979	1006
1980	1229
1981	1211
1982	1198
1983	1206
1984	1170
1985	1209
1986	1305
1987	1320
1988	1351
1989	1313
1990	1318
1991	1251
1992	1222
1993	1359
1994	1433
1995	1497
1996	1583
1997	1696
1998	1841
1999	1822
2000	1834
2001	1838
2002	1773
2003	2005