Year	current US$
1991	366188697.771307
1992	508772686.576664
1993	426341356.801349
1994	407564943.50251
1995	987506042.111768
1996	1372165438.9405
1997	1670652169.36585
1998	1710573871.48841
1999	2369393542.69127
2000	2362704811.41836
2001	2112332830.65345
2002	2554693142.04776
2003	2452809626.2238
2004	2633850823.19654
2005	2600436207.7474
2006	2313412322.45758
2007	2567854744.78463
2008	2380132448.32619
2009	2003030359.18616
2010	1932861166.1399
2011	1631739057.09049
2012	1804841781.67909
2013	1708436823.74872
2014	1721205952.27181
2015	1773218597.30578
2016	1977436097.88859
2017	1548677487.26443
2018	1341149921.09057
2019	2142332948.33483
2020	792572114.874635
2021	504495498.464857