Year	current US$
1985	545.2343647200399
1986	559.875808819421
1987	485.08398655907945
1988	458.60151933077793
1989	664.8984155962028
1990	562.5444841319169
1991	684.8665840277025
1992	75.2196529339516
1993	88.78240309377472
1994	15.484510047436899
1995	181.0514879369589
1996	208.4787472273747
1997	265.6306186379772
1998	252.9833439845163
1999	164.26280027804665
2000	198.96180542282747
2001	251.39803243622455
2002	547.3541682930781
2003	653.3499891324276
2004	772.3843392624523
2005	1010.9782210553474
2006	1367.0035328043075
2007	1469.135354183473
2008	1509.092821191459
2009	1862.5677883238402
2010	1869.182815688662
2011	2459.515403598244
2012	2864.093618861422
2013	3187.601760630561
2014	3490.9215231181183
2015	2374.5319963952716
2016	1207.2152147198847
2017	1501.6375310788096
2018	1507.8634533232528
2019	1328.7081430911744
2020	1100.9628339281144
2021	1232.9482332004493