Year	current US$
1987	600000.023841858
1988	4409999.90701675
1989	17859999.503940307
1990	35859998.82966275
1991	121320004.06831498
1992	189220001.44794616
1993	230630003.47837827
1994	160549995.759502
1995	55119999.58381068
1996	44419998.798519365
1997	46859999.898821086
1998	27709999.91521234
1999	28119999.23735855
2000	17469999.32266774
2001	24429999.440908395
2002	49659999.76173047
2003	40599998.23570256
2004	52599999.8636544
2005	25289999.961853016
2006	144789992.80929568
2007	119750002.86102289
2008	184619999.40872186
2009	288259994.5068366
2010	133810000.89645386
2011	45259999.75204463
2012	21749999.582767516
2013	31589999.40566715
2014	10479999.914765365
2015	-18310000.0619888
2016	39269999.92132191
2017	73029998.77557155
2018	51240000.72479258
2019	53189998.98433688
2020	73670000.31471254
2021	80080002.30789189
2022	88100001.33514401