Year	current US$
1974	780510384.8507121
1975	778475941.4667059
1976	1072913605.9691392
1977	1360990407.4772484
1978	1563747100.4056685
1979	2268966842.917043
1980	4026698947.510004
1981	3468087160.8355594
1982	3075197719.6528077
1983	2663921819.17134
1989	794253888.4598858
1990	863984269.5277824
1991	981158287.7485456
1992	416828579.09337634
1993	123159492.78093515
1994	109332977.18279688
1995	184143222.50639385
1996	-36169161.038579725
1997	-68022354.43552895
1998	-280831404.36017644
1999	341011600.8842702
2000	1892626639.8988843
2001	1698886490.8247538
2002	1489807147.149428
2003	2184927071.3811355
2004	2913386004.728356
2005	4087004062.131811
2006	5334712036.316195
2007	4893563939.268875
2008	7295258780.369568
2009	3970385729.381006
2010	5406972744.587678
2011	7312906377.468076
2012	6606288418.308102
2013	4550155614.842475
2014	5801830250.0315695
2015	1878435767.8424277
2016	1349307378.9569166
2017	1694275073.1230776
2018	1352406111.8569758
2019	994355891.5394082
2020	530802716.2367553
2021	1850917802.9285455
2022	4304628429.043421
2023	2497175373.0232005