Year	US Dollars adjusted for inflation)
1950	5636
1951	5754
1952	5431
1953	5230
1954	4913
1955	4953
1956	4931
1957	4881
1958	4544
1959	4567
1960	3534
1961	4319
1962	4388
1963	4809
1964	4835
1965	4568
1966	4522
1967	4523
1968	4085
1969	4102
1970	4222
1971	4469
1972	4521
1973	5018
1974	5211
1975	5820
1976	6261
1977	6568
1978	6656
1979	6711
1980	6276
1981	6355
1982	6793
1983	6784
1984	6962
1985	7380
1986	7914
1987	8663
1988	9012
1989	9515
1990	9871
1991	10350
1992	10830
1993	11260
1994	11580
1995	12420
1996	12920
1997	13150
1998	13850
1999	14060
2000	15120
2001	16280
2002	15970
2003	16460
2004	16950