Year	US Dollars adjusted for inflation)
1960	3264
1961	3356
1962	3664
1963	4360
1964	4799
1965	5459
1966	5875
1967	5821
1968	5956
1969	6528
1970	6988
1971	7475
1972	8043
1973	8798
1974	8639
1975	8656
1976	9556
1977	10720
1978	11740
1979	12340
1980	13330
1981	14200
1982	14460
1983	14970
1984	15970
1985	16080
1986	17410
1987	19350
1988	20760
1989	21180
1990	22000
1991	23190
1992	24500
1993	25620
1994	26620
1995	26890
1996	27160
1997	27920
1998	25490
1999	25360
2000	27240
2001	27020
2002	27160
2003	27660
2004	29640