Year	current US$
1960	46433217.25029021
1961	45149887.12528218
1962	33424916.437708903
1963	23274941.81264547
1964	30799923.000192497
1965	41176470.5882353
1966	50764705.88235294
1967	61764705.88235294
1968	48000000
1969	49000000
1970	56300000
1971	51400000
1972	51571428.57142857
1973	73714285.71428572
1974	90045454.54545453
1975	145958333.33333334
1976	152400000
1977	116000000
1978	96800000
1979	130000000
1980	179600000
1981	168214285.71428573
1982	120333333.33333333
1983	104666666.66666667
1984	120000000
1985	135348837.20930234
1986	170465116.27906978
1987	98571428.57142857
1988	74600000
1989	71654415.44117647
1990	109898739.24050634
1991	138587738.81932023
1992	193329055.1558753
1993	183584748.8479263
1994	147241722.34273317
1995	206558395.7746479
1996	224722649.57264957
1997	238884693.92771116
1998	207515291.7571868
1999	173674537.3543523
2000	169443794.33207256
2001	153616973.82586378
2002	151474640.8622453
2003	155687619.8228917
2004	185496259.59683824
2005	266716697.93621013