Year	US Dollars adjusted for inflation)
1950	4101
1951	4018
1952	4023
1953	4238
1954	4365
1955	4431
1956	4592
1957	4689
1958	4621
1959	4786
1960	4886
1961	5195
1962	5496
1963	5528
1964	5511
1965	5712
1966	5924
1967	5981
1968	6233
1969	6294
1970	6404
1971	6481
1972	6682
1973	6707
1974	6569
1975	6821
1976	6984
1977	7138
1978	7083
1979	7220
1980	7514
1981	7467
1982	7588
1983	7794
1984	7761
1985	7649
1986	7427
1987	7458
1988	7543
1989	7687
1990	7723
1991	7562
1992	7279
1993	7284
1994	7311
1995	7335
1996	7545
1997	7672
1998	7697
1999	7916
2000	8226
2001	8447
2002	8655
2003	8835
2004	9145