Year	current US$
1970	14764.8671231794
1971	44714.9537975237
1972	66686.0795684289
1973	115455.190879514
1974	677718.609564311
1975	606370.543405864
1976	606532.80951523
1977	561263.229779159
1978	529235.952327692
1979	1226734.52919724
1980	1595884.63814567
1981	1118322.18114214
1982	664032.768640451
1983	862895.304890688
1984	832194.701565533
1985	772495.023235425
1986	295903.591812094
1987	434603.294377669
1988	329902.086801835
1989	490171.815125044
1990	610553.981818422
1991	275119.27847396
1992	325659.663522121
1993	296259.821111224
1994	249147.303691408
1995	261803.223448417
1996	344309.025075232
1997	253895.608787033
1998	74396.5856209632
1999	211194.483166535
2000	438898.386829939
2001	306201.113341525
2002	302083.271888545
2003	335565.203658117
2004	428640.362323127
2005	820019.652740383
2006	1378720.00987709
2007	1659616.80506608
2008	4568827.7988692
2009	2786546.97500777
2010	2060540.09080402
2011	3980510.56635496
2012	3239111.78111203
2013	2702111.97887069
2014	2030989.59855684
2015	757370.386029262
2016	502384.618883628
2017	648324.667192813
2018	1069924.33889186
2019	904876.392562956
2020	543204.908510543
2021	1194026.08164442