Year	US Dollars adjusted for inflation)
1950	7292
1951	7338
1952	7647
1953	8106
1954	8327
1955	8467
1956	8613
1957	8887
1958	8940
1959	9083
1960	9375
1961	9867
1962	10080
1963	10430
1964	10850
1965	11360
1966	11720
1967	12390
1968	12540
1969	12960
1970	13220
1971	13860
1972	14290
1973	14880
1974	15470
1975	16200
1976	17090
1977	17730
1978	17980
1979	18690
1980	19520
1981	19630
1982	19710
1983	20140
1984	21240
1985	22270
1986	23190
1987	23440
1988	23340
1989	23580
1990	23990
1991	24700
1992	25370
1993	25960
1994	27270
1995	28340
1996	29780
1997	31310
1998	31950
1999	32360
2000	33090
2001	33720
2002	33850
2003	34010
2004	34770