Year	US Dollars adjusted for inflation)
1950	11090
1951	11850
1952	12190
1953	12490
1954	12080
1955	12760
1956	12790
1957	12770
1958	12440
1959	12930
1960	13030
1961	13110
1962	13720
1963	14140
1964	14770
1965	15550
1966	16320
1967	16500
1968	17190
1969	17590
1970	17430
1971	17870
1972	18700
1973	19580
1974	19260
1975	19050
1976	19940
1977	20700
1978	21630
1979	22050
1980	21680
1981	21990
1982	21430
1983	22260
1984	23680
1985	24420
1986	25010
1987	25580
1988	26340
1989	26980
1990	27170
1991	26790
1992	27430
1993	27940
1994	28850
1995	29290
1996	30120
1997	31250
1998	32300
1999	33440
2000	34360
2001	34160
2002	34290
2003	34880
2004	36100