Year	US Dollars adjusted for inflation)
1950	2275
1951	2279
1952	2320
1953	2316
1954	2274
1955	2188
1956	2240
1957	2289
1958	2382
1959	2464
1960	2493
1961	2575
1962	2568
1963	2646
1964	2662
1965	2700
1966	2806
1967	2815
1968	2952
1969	3091
1970	3152
1971	3184
1972	3406
1973	3485
1974	3513
1975	3552
1976	3566
1977	3707
1978	3764
1979	3931
1980	4067
1981	3959
1982	3810
1983	3704
1984	3604
1985	3532
1986	3478
1987	3405
1988	3445
1989	3478
1990	3500
1991	3492
1992	3447
1993	3509
1994	3546
1995	3608
1996	3664
1997	3654
1998	3743
1999	3824
2000	3859
2001	3829
2002	3783
2003	3805