Year	current US$
1979	12507374615.5438
1980	29106089267.3155
1981	35369323781.3894
1982	23148045450.2368
1983	18096116700.9779
1984	19367516454.2048
1985	21658963992.117
1986	2558518389.07071
1987	11175444981.5102
1988	7125092230.92464
1989	11391278351.3554
1990	16854424894.2137
1991	16363583599.8459
1992	12770471137.3713
1993	39336243342.4951
1994	43076607602.232
1995	26969995724.0441
1996	33747783482.922
1997	50035157350.4662
1998	50933164942.1521
1999	54535485251.4293
2000	59251138539.6646
2001	54981034884.657
2002	45673837440.0971
2003	32932441988.3666
2004	59051449728.0595
2005	60421981043.2594
2006	90220669321.8745
2007	93606239977.5376
2008	93010336370.2629
2009	57740017573.8321
2010	84110098104.9712
2011	96467195735.8709
2012	89135823572.8468
2013	55832371857.0224
2014	74835804900.4331
2015	63162440040.3576
2016	57018397602.2128
2017	69362257555.7438
2018	76768544461.9718
2019	77945609506.0846
2020	56816339340.0492
2021	44645259712.601