Year	current US$
1987	600000.023841858
1988	24409999.787807476
1989	59529999.6528775
1990	81870000.31210482
1991	92909999.71516426
1992	63189998.896792606
1993	73009998.76297997
1994	129060001.09389426
1995	158629998.99499115
1996	105000000.07264313
1997	155659999.7393787
1998	158850001.29230306
1999	149500000.7059426
2000	111590002.2443384
2001	501230001.3061611
2002	216659999.9330939
2003	279880000.63039374
2004	418230001.76250917
2005	562050005.5328009
2006	289710006.0936064
2007	644600002.6855617
2008	970179997.3864117
2009	1248089996.4775891
2010	1044790011.651814
2011	617059996.8396127
2012	307079998.3981996
2013	427080001.8366429
2014	157540000.89317554
2015	95200000.49471846
2016	129759999.83772628
2017	230150001.01178887
2018	139180001.24394906
2019	180629998.890683
2020	165580001.17540348
2021	206839996.60983694
2022	203019999.0067632