Year	US Dollars adjusted for inflation)
1950	5139
1951	5611
1952	5851
1953	5669
1954	6157
1955	6602
1956	6730
1957	6682
1958	6587
1959	7041
1960	7674
1961	8204
1962	8352
1963	8575
1964	9006
1965	9495
1966	9676
1967	9816
1968	9985
1969	10960
1970	11800
1971	11970
1972	12670
1973	13380
1974	14090
1975	14010
1976	13740
1977	14010
1978	14100
1979	14950
1980	15760
1981	16050
1982	16480
1983	16760
1984	17160
1985	17380
1986	17640
1987	18210
1988	19160
1989	20290
1990	19880
1991	18220
1992	17310
1993	16800
1994	17450
1995	18220
1996	18590
1997	19900
1998	21070
1999	21590
2000	22740
2001	22910
2002	23460
2003	23790
2004	24610