Year	current US$
1990	878027224.1270157
1991	865613977.7653277
1992	926327060.9236978
1993	854160933.8422242
1994	864876801.8662461
1995	957466018.3259745
1996	1000834232.8212028
1997	928755650.3244425
1998	1280786335.828036
1999	1384711062.0553496
2000	1285447835.9531446
2001	1301799212.5072083
2002	1424099924.3797438
2003	2028849726.2740805
2004	2156845271.6285686
2005	2523097105.1225047
2006	3079718839.9387574
2007	3950411263.8850083
2008	4476071378.58061
2009	3540660799.999009
2010	4491985788.626427
2011	4839684686.559426
2012	4442712898.84796
2013	4380245208.3006
2014	4293535821.890582
2015	3668090538.309615
2016	3382003230.667716
2017	3478834537.037726