Year	current US$
1990	7895029725.99388
1991	10765038255.2538
1992	15658205759.779
1993	21971658376.638
1994	21856000337.2799
1995	19268317097.2496
1996	23775693458.5605
1997	22021295645.0647
1998	23132627671.5464
1999	12101575885.411
2000	12400696117.5068
2001	12165163416.2219
2002	5138588670.80757
2003	10438125008.0192
2004	1850556679.04519
2005	2573031930.37653
2006	22406934198.2929
2007	33968113559.5788
2008	38953160801.0738
2009	27282093412.5689
2010	31157284589.1492
2011	38625057208.6174
2012	31271640820.1585
2013	25741084075.4685
2014	25732081099.0737
2015	32168899340.8271
2016	30122306258.2403
2017	34610770215.5037
2018	10577131995.145
2019	14897309309.4755
2020	29256476459.5336
2021	55440253035.4655