Year	current US$
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	31500000.834464997
1988	62699999.8092651
1989	117269998.62864599
1990	151039999.51481798
1991	313900005.158037
1992	400139999.55542403
1993	429220007.237047
1994	358189997.700974
1995	354350002.784282
1996	344319999.743253
1997	298650000.451133
1998	292520001.869649
1999	349859995.655715
2000	277270000.79676497
2001	675980003.543198
2002	388390003.927052
2003	467109998.006374
2004	615920004.9620119
2005	578569997.707382
2006	758919993.972406
2007	1133639999.40827
2008	1936070006.84738
2009	1458289980.09861
2010	1334670004.9303498
2011	748879994.258285
2012	271099997.300655
2013	239940001.957119
2014	47690003.9035827
2015	121839994.87757699
2016	2233639884.56503
2017	155360001.38148698
2018	247970001.04188898
2019	248750001.84588102
2020	299600000.102073
2021	336409996.913746
2022	302530000.5692987