Year	current US$
1985	320855614.973262
1986	447860962.566845
1987	354278074.86631
1988	334298241.97861
1989	501447362.967913
1990	441176470.588234
1991	468499207.998285
1992	154550693.767235
1993	143042164.015775
1994	85858467.1174147
1995	210815317.67189
1996	257568357.130197
1997	297374094.213674
1998	155048943.066399
1999	143416748.219149
2000	222717170.981021
2001	214983478.086083
2002	387686651.838954
2003	444784089.07438
2004	566741522.176667
2005	861382764.333161
2006	1173560198.48497
2007	1613245661.23163
2008	2285785167.17927
2009	2102907607.19003
2010	2635206624.60899
2011	3567979650.801
2012	4099254026.98071
2013	4417558632.68442
2014	4602044042.57063
2015	2955420043.59899
2016	1686512867.23382
2017	2310987799.41673
2018	2562668912.75516
2019	2250633348.4108
2020	1753095950.05464
2021	2216268401.89677