Year	US Dollars adjusted for inflation)
1960	953.9
1961	1014
1962	1061
1963	1015
1964	1027
1965	1044
1966	1030
1967	1038
1968	1103
1969	1173
1970	1235
1971	1407
1972	1393
1973	1461
1974	1386
1975	1514
1976	1587
1977	1587
1978	1673
1979	1890
1980	2089
1981	2555
1982	2813
1983	2830
1984	2903
1985	2807
1986	2535
1987	2439
1988	2423
1989	2402
1990	2646
1991	2368
1992	2512
1993	2107
1994	1956
1995	2161
1996	2193
1997	2238
1998	2548
1999	1512
2000	1286
2001	1405
2002	1477
2003	1421