Year	current US$
1987	45500000.83446506
1988	110920000.37431723
1989	216359998.71045354
1990	478789998.2016534
1991	633679999.2546438
1992	959030002.2140152
1993	851190012.0861834
1994	748739999.0111594
1995	588559998.8847972
1996	717739995.8446621
1997	575359998.7905473
1998	604980001.4458594
1999	607169998.1503187
2000	483570002.75142485
2001	962400000.1922249
2002	757250000.7674098
2003	853260002.7732553
2004	1091720002.9604135
2005	1458810003.6662073
2006	1562659984.1676652
2007	2091359997.6170805
2008	2775729995.604606
2009	3011149978.572503
2010	2226820011.569187
2011	1272099999.7947364
2012	552899998.5810368
2013	627690001.9999598
2014	253640002.47605145
2015	-71020001.63309284
2016	164149999.43040326
2017	353519997.8351592
2018	329290004.4880811
2019	413729997.8565426
2020	375840000.3425777
2021	478359994.58096933
2022	553810002.2058933