Year	US Dollars adjusted for inflation)
1950	4479
1951	4613
1952	4590
1953	4757
1954	4825
1955	5045
1956	4948
1957	4874
1958	4881
1959	5141
1960	5380
1961	5639
1962	5819
1963	6070
1964	6282
1965	6378
1966	6393
1967	6712
1968	7256
1969	7661
1970	7752
1971	7952
1972	8432
1973	8824
1974	8974
1975	8982
1976	9144
1977	9701
1978	10310
1979	10640
1980	10620
1981	10830
1982	10730
1983	10540
1984	10770
1985	10980
1986	10980
1987	11270
1988	11740
1989	12450
1990	13460
1991	13660
1992	13990
1993	14280
1994	15060
1995	16490
1996	17770
1997	19650
1998	21020
1999	23190
2000	24950
2001	26140
2002	27220
2003	28250
2004	28960