Year	current US$
1970	2738437.32611798
1971	2917008.71172646
1972	3733582.3289314
1973	2323168.4558731
1974	2877042.63726831
1975	4097186.90333048
1976	6732830.29871021
1977	5276638.18279074
1978	4120537.00229294
1979	4258295.34612452
1980	6133501.1563858
1981	6699322.78914201
1982	7694346.31446144
1983	5917951.78064523
1984	4983752.13736931
1985	4925311.52497354
1986	4577242.97368827
1987	4043285.10731656
1988	3210387.29391067
1989	3529637.72317915
1990	1707151.33621029
1991	496985.126947109
1992	285431.865716426
1993	270360.876919967
1994	0
1995	843035.076171552
1996	1902682.79622864
1997	855908.737681384
1998	1119970.0007237
1999	22884.697011411
2000	37653.0398546063
2001	79766.9965104686
2002	106047.719554784
2003	18456.2664764744
2004	95730.6275977532
2005	37708.6583460677
2006	34982.0833376489
2007	1365263.45630508
2008	3454122.33348938
2009	3535909.39739081
2010	6055466.18366135
2011	11510959.9260868
2012	17539649.7915585
2013	18377876.0776169
2014	13379830.7770926
2015	5524606.90805871
2016	611741.295353482
2017	1513541.75546972
2018	0
2019	0
2020	0
2021	147813775.881921