Year	current US$
1980	1409207307.48227
1981	1664650634.205
1982	1520631200.2879
1983	1498455260.30294
1984	1291413037.03244
1985	580444942.522226
1986	257390960.228973
1987	389731874.250241
1988	752843090.490027
1989	503327731.744824
1990	1123581625.4694
1991	249270183.701658
1992	88838395.0463572
1993	86722424.3256781
1994	359219098.821893
1995	502514500.325751
1996	543947182.3383
1997	486917819.921071
1998	-77330489.814788
1999	-184620985.930289
2000	1498087659.47486
2001	775032228.958179
2002	1334973766.17175
2003	1900478267.53608
2004	2176497282.36199
2005	4720836169.65742
2006	6677913078.06026
2007	9180484689.18801
2008	9961825132.24653
2009	5254759978.93918
2010	6327670506.51611
2011	6076921322.32458
2012	9647330435.94962
2013	9191453552.76245
2014	8735711771.10276
2015	5155596991.24003
2016	5787092784.23636
2017	7666573690.51735
2018	7848279911.41317