Year	current US$
1990	344041888.401466
1991	363077053.069224
1992	379572764.433285
1993	310906034.682191
1994	236520565.597821
1995	230394206.740436
1996	299677787.728192
1997	354031844.709883
1998	329901976.468673
1999	402331809.21577
2000	510458694.347167
2001	511458500.70207
2002	546924455.409396
2003	615527802.186901
2004	941102548.859079
2005	967534555.916233
2006	1153659523.92601
2007	1367226853.05063
2008	1780995865.957
2009	1556713706.29973
2010	1803032791.69497
2011	1285486446.69271
2012	1741314478.37717
2013	1867877242.67109
2014	1905966901.05839
2015	1973604198.29546
2016	1454982055.99993
2017	1227175712.31211
2018	919219110.532183