Year	US Dollars adjusted for inflation)
1950	5011
1951	5335
1952	5304
1953	5470
1954	5930
1955	6519
1956	6736
1957	7154
1958	7421
1959	7631
1960	8495
1961	8906
1962	9071
1963	9374
1964	9869
1965	10110
1966	10610
1967	10880
1968	11300
1969	11910
1970	12690
1971	13290
1972	14060
1973	14720
1974	15220
1975	15180
1976	15890
1977	16720
1978	16450
1979	17740
1980	17830
1981	17910
1982	18240
1983	18710
1984	18790
1985	19360
1986	19650
1987	19930
1988	20620
1989	21410
1990	22220
1991	22760
1992	23090
1993	22980
1994	23270
1995	23590
1996	24020
1997	24490
1998	25340
1999	26110
2000	27000
2001	27190
2002	27350
2003	27570
2004	28160