Year	current US$
1987	12799999.83310696
1988	11209999.918937681
1989	25680000.39085744
1990	65389999.784529194
1991	47410000.711679466
1992	54249998.28264118
1993	28899999.842047665
1994	78880001.94542108
1995	36199999.69378111
1996	132379999.47741608
1997	43289999.859407544
1998	103320001.37865545
1999	88690001.77457935
2000	34820000.324398294
2001	41029999.29338694
2002	89070000.37655243
2003	85740001.01163983
2004	86419999.94218361
2005	333900004.7743319
2006	225179994.1211941
2007	212919998.64578253
2008	313389997.1246719
2009	388929998.099804
2010	236439998.65651134
2011	220150000.53495166
2012	143939999.19854107
2013	321760001.5997891
2014	73940000.6588548
2015	48799999.80889253
2016	40170000.57362022
2017	102710000.86516142
2018	43930001.027882166
2019	89319998.32391748