Year	US Dollars adjusted for inflation)
1950	6290
1951	6504
1952	6622
1953	6795
1954	7065
1955	7298
1956	7482
1957	7582
1958	7469
1959	7671
1960	8051
1961	8404
1962	8817
1963	9198
1964	9781
1965	10040
1966	10310
1967	10670
1968	11090
1969	11770
1970	12470
1971	12880
1972	13510
1973	14330
1974	14910
1975	14650
1976	15460
1977	15550
1978	16000
1979	16370
1980	17060
1981	16930
1982	17020
1983	17040
1984	17490
1985	17760
1986	18070
1987	18480
1988	19380
1989	20040
1990	20640
1991	20930
1992	21180
1993	20890
1994	21490
1995	21940
1996	22090
1997	22790
1998	23160
1999	23790
2000	24660
2001	24820
2002	25110
2003	25260
2004	25880