Year	current US$
1988	146140784.914714
1989	201690077.036004
1990	25133519.3756805
1991	318905299.871931
1992	214346919.452257
1993	-108259278.962535
1994	-42443537.2232336
1995	692714209.964878
1996	724983550.856235
1997	715929099.684833
1998	885789312.058409
1999	1044198742.72214
2000	428080003.679423
2001	322906388.856447
2002	326033366.688914
2003	475215521.314199
2004	443713777.496968
2005	653668407.20473
2006	647757358.382831
2007	791914959.51496
2008	772969883.681541
2009	910860813.269313
2010	2366922957.70332
2011	1851712887.20649
2012	1335328072.71757
2013	1394275193.89322
2014	1142895596.10636
2015	1293817982.34474
2016	1130383735.03416
2017	1623320860.9467
2018	1419623591.57612
2019	1683878168.29273
2020	1988551649.91793
2021	1970700012.96474