Year	US Dollars adjusted for inflation)
1950	2856
1951	2995
1952	2965
1953	2556
1954	2508
1955	2584
1956	2424
1957	2401
1958	2384
1959	2385
1960	2406
1961	2456
1962	2424
1963	2565
1964	2616
1965	2753
1966	2861
1967	3004
1968	2563
1969	2589
1970	2539
1971	2580
1972	2654
1973	2784
1974	2848
1975	2952
1976	3107
1977	3193
1978	3131
1979	3138
1980	3078
1981	3050
1982	2915
1983	2680
1984	2636
1985	2562
1986	2445
1987	2503
1988	2525
1989	2557
1990	2582
1991	2618
1992	2602
1993	2651
1994	2714
1995	2764
1996	2798
1997	2846
1998	2879
1999	2915
2000	2929
2001	2956
2002	2971
2003	3006