Year	US Dollars adjusted for inflation)
1950	1232
1951	1307
1952	1344
1953	1363
1954	1293
1955	1263
1956	1278
1957	1300
1958	1376
1959	1379
1960	1451
1961	1498
1962	1473
1963	1447
1964	1696
1965	1724
1966	1678
1967	1708
1968	1800
1969	1848
1970	1892
1971	1908
1972	1978
1973	1873
1974	1900
1975	1829
1976	2042
1977	2228
1978	2239
1979	2335
1980	2572
1981	2550
1982	2608
1983	2714
1984	2789
1985	2862
1986	2957
1987	3081
1988	3124
1989	3266
1990	3384
1991	3499
1992	3566
1993	3587
1994	3667
1995	3757
1996	4103
1997	4095
1998	4252
1999	4425
2000	4536
2001	4609
2002	4688
2003	4759