Year	current US$
1987	19428571428.57143
1988	22473684210.526314
1989	22484210526.31579
1990	22714285714.285717
1991	22171794871.794872
1992	21752716593.245228
1993	26523952891.171524
1994	17085034028.453812
1995	18068648234.179783
1996	18902752656.64518
1997	21982555335.083027
1998	17621253279.184433
1999	12398188862.112093
2000	12867463581.063532
2001	17647288769.754845
2002	20513364466.242695
2003	25637539642.29672
2004	34431848091.74657
2005	44067891199.710266
2006	55744554455.44555
2007	76772079207.92079
2008	99469720370.57112
2009	68062978421.92
2010	78356008885.98889
2011	90594200510.24385
2012	99467415272.80153
2013	107903665707.49405
2014	72304253028.54234
2015	46579311831.1821
2016	46597880173.30132
2017	57119882138.34502
2018	67189409662.14876
2019	83843978173.60634
2020	87377052877.70494
2021	103689269322.29341
2022	99975443924.80165
2023	109662685029.32219