Year	current US$
1960	17443973.98241041
1961	18465967.97361281
1962	19697976.440809425
1963	20761971.535211388
1964	22903966.19841352
1965	27271989.091204364
1966	29469988.212004717
1967	32675986.92960523
1968	34901986.03920559
1969	37842843.428571425
1970	37857142.85714286
1971	39559206.22375521
1972	56589258.21528984
1973	72753307.96784207
1974	125655302.30341542
1975	160127084.98808578
1976	241302631.29467833
1977	106811594.20289855
1978	162085639.77900553
1979	135695538.05774277
1980	255898030.50623676
1981	192707709.32149652
1982	226751398.8771519
1983	164545286.2167141
1984	190771337.29666826
1985	261171754.73515248
1986	234436372.6830774
1987	336271018.5641334
1988	248149875.11246023
1989	330994228.30756015
1990	142141904.0752715