Year	US Dollars adjusted for inflation)
1950	7854
1951	7737
1952	7582
1953	8207
1954	8847
1955	9312
1956	9772
1957	9842
1958	9315
1959	9633
1960	10480
1961	10420
1962	10930
1963	11170
1964	11970
1965	12400
1966	12540
1967	13050
1968	13740
1969	14370
1970	15040
1971	15430
1972	15580
1973	16160
1974	16640
1975	16490
1976	17080
1977	17490
1978	17850
1979	17990
1980	18130
1981	17670
1982	17340
1983	17580
1984	17980
1985	18380
1986	18890
1987	19100
1988	19510
1989	20310
1990	20970
1991	21320
1992	21470
1993	21440
1994	21910
1995	22430
1996	23010
1997	23750
1998	24650
1999	25510
2000	26290
2001	26490
2002	26350
2003	26150
2004	26480