Year	US Dollars adjusted for inflation)
1950	8441
1951	8568
1952	8720
1953	8999
1954	9434
1955	9637
1956	9881
1957	10020
1958	10260
1959	10720
1960	10960
1961	11480
1962	11880
1963	12450
1964	13100
1965	13500
1966	13690
1967	14010
1968	14380
1969	14920
1970	15690
1971	15690
1972	16000
1973	16430
1974	16920
1975	17400
1976	17660
1977	17270
1978	17340
1979	17950
1980	18170
1981	17960
1982	18130
1983	18280
1984	19030
1985	19530
1986	20020
1987	20670
1988	21130
1989	21650
1990	21710
1991	21250
1992	20880
1993	20230
1994	20920
1995	21650
1996	21860
1997	22290
1998	23100
1999	24170
2000	25230
2001	25400
2002	25760
2003	26140
2004	27080