Year	current US$
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	19500000.7748604
1989	2999999.99627471
1990	123179998.263717
1991	107869997.382164
1992	205360001.81175798
1993	226810006.178916
1994	215269995.95575002
1995	112389998.698607
1996	89529998.4868616
1997	105219997.599721
1998	49009999.8582155
1999	65380000.71980061
2000	109660002.470016
2001	74019997.8910387
2002	52289999.0864098
2003	64610000.224784
2004	49870000.4816055
2005	83000002.6226044
2006	61290000.6715208
2007	144379997.575656
2008	189320002.68436998
2009	100369998.978451
2010	88359999.2040545
2011	20729999.0877509
2012	24299999.7586012
2013	-20810000.4326552
2014	3060000.28550625
2015	-61820000.1660734
2016	-46220000.5557388
2017	-52629999.9132752
2018	-62840000.2755225
2019	-55340000.117197596
2020	-54330000.080168195
2021	-51890000.782907
2022	-49050001.185387366