Year	US Dollars adjusted for inflation)
1950	9261
1951	9215
1952	8613
1953	9390
1954	9924
1955	10130
1956	9936
1957	9932
1958	10390
1959	10780
1960	10780
1961	10690
1962	11130
1963	11650
1964	12210
1965	12290
1966	12730
1967	12980
1968	13810
1969	14310
1970	14670
1971	15080
1972	15360
1973	15900
1974	15620
1975	15830
1976	16250
1977	16370
1978	16880
1979	17090
1980	17460
1981	17940
1982	17500
1983	17980
1984	18480
1985	19140
1986	19290
1987	19920
1988	20270
1989	20770
1990	20420
1991	20380
1992	20800
1993	21300
1994	22010
1995	22650
1996	23270
1997	24010
1998	24950
1999	25660
2000	25830
2001	26530
2002	27120
2003	27870
2004	27990