Year	current US$
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	31500000.834464997
1988	68599999.6066093
1989	159399996.68672702
1990	169939999.073744
1991	317540005.024523
1992	433459998.415783
1993	478580007.60898
1994	401109998.194501
1995	397800002.11671
1996	367999999.094754
1997	284160000.918433
1998	316260001.16393
1999	382499995.283782
2000	319640000.581741
2001	693640003.208071
2002	413860003.873706
2003	517369999.71233296
2004	631440005.009994
2005	584169997.468591
2006	783709993.552417
2007	1181459999.36014
2008	1975730005.96464
2009	1500049980.3815
2010	1368660004.43138
2011	765929994.678125
2012	275279997.30780697
2013	245430001.975968
2014	50370003.955438696
2015	114769994.76551999
2016	2238379884.63789
2017	194800001.019612
2018	309900001.347065
2019	315960000.334308
2020	347909999.091178
2021	340659996.749833
2022	311890000.1663713