Year	US Dollars adjusted for inflation)
1954	421.5
1955	428.9
1956	437.4
1957	453.3
1958	447.9
1959	451.4
1960	457.6
1961	458.9
1962	466
1963	448.9
1964	457.7
1965	492.7
1966	527.4
1967	545.7
1968	512.6
1969	525.4
1970	470.9
1971	515.1
1972	562.2
1973	579.4
1974	608.7
1975	612.3
1976	632.2
1977	647.7
1978	664.1
1979	709.9
1980	707.2
1981	701
1982	699
1983	713.2
1984	715.2
1985	742
1986	741.1
1987	717.4
1988	680.6
1989	684.6
1990	682.3
1991	686
1992	602.5
1993	668.9
1994	819.1
1995	828.1
1996	810.9
1997	835.3
1998	827.2
1999	832.1
2000	839
2001	756.4
2002	749.9
2003	770.5
2004	803.4