Year	current US$
1977	693780152.291755
1978	629615721.737077
1979	616464317.956021
1980	536104706.722216
1981	305534619.551133
1982	206865835.164951
1983	114505641.182247
1984	37335813.1860116
1985	160813033.107594
1986	214952101.338555
1987	65498712.8395393
1988	126586230.743157
1989	219190872.792029
1990	285698352.864058
1991	572422140.435897
1992	536351530.996961
1993	522365922.280797
1994	540507380.458272
1995	658387476.481662
1996	441832330.707352
1997	533552092.206265
1998	895896433.885929
1999	720991996.402386
2000	798857972.688398
2001	255045705.877888
2002	968603904.127567
2003	1052944728.42052
2004	1360655014.31109
2005	933208554.759256
2006	1103434775.48031
2007	1177111574.89047
2008	57317796.4190197
2009	347356735.416174
2010	-97152867.5173121
2011	-231221970.023403
2012	18360456.3945322
2013	-105090937.801784
2014	219636190.81865
2015	1581664489.61021
2016	1796099889.63842
2017	1592121081.98152
2018	1954086685.65404
2019	3803396823.80963
2020	5184731562.36238
2021	6647651326.08352