Year	US Dollars adjusted for inflation)
1950	2699
1951	2869
1952	2896
1953	2801
1954	3021
1955	3173
1956	3302
1957	3463
1958	3533
1959	3502
1960	3695
1961	3685
1962	3721
1963	3941
1964	4330
1965	4414
1966	4537
1967	4648
1968	4893
1969	4948
1970	5109
1971	5178
1972	5438
1973	5698
1974	5851
1975	6030
1976	6109
1977	6116
1978	6438
1979	6832
1980	7201
1981	7623
1982	7405
1983	6937
1984	7028
1985	7082
1986	6684
1987	6620
1988	6529
1989	6677
1990	6877
1991	7034
1992	7148
1993	7152
1994	7327
1995	6769
1996	6958
1997	7289
1998	7528
1999	7701
2000	8082
2001	7974
2002	7927
2003	7939
2004	8168