Year	US Dollars adjusted for inflation)
1950	2392
1951	2594
1952	2847
1953	2996
1954	3112
1955	3304
1956	3498
1957	3709
1958	3846
1959	4149
1960	4632
1961	5154
1962	5551
1963	5975
1964	6599
1965	6879
1966	7539
1967	8305
1968	9286
1969	10320
1970	11330
1971	11690
1972	12500
1973	13360
1974	12970
1975	13170
1976	13530
1977	13970
1978	14600
1979	15290
1980	15520
1981	15850
1982	16150
1983	16270
1984	16660
1985	17430
1986	17870
1987	18470
1988	19670
1989	20640
1990	21640
1991	22290
1992	22400
1993	22360
1994	22500
1995	22880
1996	23610
1997	23940
1998	23580
1999	23460
2000	23970
2001	23950
2002	23760
2003	24040
2004	24660