Year	US Dollars adjusted for inflation)
1950	4274
1951	4616
1952	4780
1953	5077
1954	5259
1955	5560
1956	5760
1957	5961
1958	6194
1959	6571
1960	7103
1961	7640
1962	8065
1963	8467
1964	8611
1965	8822
1966	9306
1967	9887
1968	10490
1969	11060
1970	11590
1971	11720
1972	12000
1973	12730
1974	13340
1975	12940
1976	13740
1977	13970
1978	14420
1979	15190
1980	15730
1981	15790
1982	15870
1983	16030
1984	16480
1985	16970
1986	17410
1987	17930
1988	18630
1989	19170
1990	19530
1991	19780
1992	19890
1993	19590
1994	19980
1995	20540
1996	20720
1997	21130
1998	21510
1999	21870
2000	22490
2001	22830
2002	22900
2003	22920
2004	23170