Year	current US$
1990	631666244.961
1991	312284431.4854
1992	489289957.046764
1993	878615812.922385
1994	1081578636.84061
1995	1026510094.53487
1996	879384103.358821
1997	651062751.917432
1998	1535122876.16989
1999	815430878.337706
2000	676300590.237152
2001	729255337.707679
2002	1022832605.41314
2003	1574861414.91354
2004	1718873720.25199
2005	1844326764.72779
2006	2069422927.36516
2007	1597428112.20463
2008	2156862599.91148
2009	2499504346.21278
2010	1634056520.8833
2011	2667152429.07691
2012	1239458662.5287
2013	771143373.984282
2014	197721070.802257
2015	920909998.327814
2016	1122680967.00984
2017	1748185590.74607
2018	1955756988.86849
2019	1701570980.65321
2020	263840271.578902
2021	499245829.397042