Year	US Dollars adjusted for inflation)
1950	6042
1951	6378
1952	6699
1953	6808
1954	6849
1955	7066
1956	7583
1957	7906
1958	7944
1959	8201
1960	8605
1961	8961
1962	9450
1963	9817
1964	10360
1965	10700
1966	11150
1967	11580
1968	12010
1969	12800
1970	13360
1971	13880
1972	14400
1973	15080
1974	15380
1975	15190
1976	15820
1977	16200
1978	16660
1979	17150
1980	17400
1981	17540
1982	18000
1983	18170
1984	18320
1985	18620
1986	19050
1987	19400
1988	20170
1989	20830
1990	21300
1991	21400
1992	21650
1993	21220
1994	21590
1995	22020
1996	22120
1997	22570
1998	23370
1999	24110
2000	25040
2001	25440
2002	25580
2003	25660
2004	26170