Year	current US$
1977	4846826402.8795
1978	6959517033.98398
1979	9470534952.38287
1980	13136247859.6971
1981	12889181209.8829
1982	12136227365.4616
1983	13370884223.8683
1984	11778110939.4783
1985	11495080796.5674
1986	7173946215.24402
1987	7377188200.37024
1988	4398960560.70184
1989	5937917258.79745
1990	10820222267.3425
1991	11958496275.0072
2005	47061301171.2541
2006	56905742206.3863
2007	68530948538.6074
2008	88270996908.1696
2009	54909367289.1115
2010	70520492797.5986
2011	85745907428.6369
2012	88322040808.0352
2013	82294218267.9468
2014	76603106217.005
2015	46240279366.2854
2016	46649461500.209
2017	51274334314.7051
2018	56031780162.809
2019	49695788235.3814
2020	31713023859.7869
2021	46257175318.8829