Year	US Dollars adjusted for inflation)
1950	1764
1951	1755
1952	1656
1953	1725
1954	1530
1955	1507
1956	1721
1957	1697
1958	1766
1959	1807
1960	1719
1961	1710
1962	1705
1963	1655
1964	1695
1965	1802
1966	1819
1967	1805
1968	1876
1969	1837
1970	1848
1971	1999
1972	2075
1973	2077
1974	1861
1975	1960
1976	2098
1977	2136
1978	2250
1979	2336
1980	2303
1981	2405
1982	2446
1983	2345
1984	2298
1985	2350
1986	2341
1987	2384
1988	2381
1989	2445
1990	2366
1991	2305
1992	2362
1993	2330
1994	2169
1995	2214
1996	2284
1997	2332
1998	2333
1999	2164
2000	2240
2001	2258
2002	2294
2003	2292
2004	2313