Year	current US$
1990	4741403657.761811
1991	6968549615.988331
1992	9416509774.870241
1993	12548137131.60978
1994	14833617230.938637
1995	17756609287.96102
1996	19495413361.906578
1997	20953556349.46411
1998	21936744294.032444
1999	21336424722.981953
2000	21016252072.96849
2001	21946932006.6335
2002	22761525704.809288
2003	24223548922.056385
2004	25574400350.381428
2005	25692666155.22388
2006	26403044903.48259
2007	30707633102.487564
2008	37719002866.99834
2009	43897760959.20398
2010	48074262303.81426
2011	51671166198.34162
2012	57629908628.192375
2013	62294664967.82753
2014	63632289629.18739
2015	62691130386.06966
2016	63561428605.63847
2017	66073318897.512436
2018	69586722981.09453
2019	62745310851.5444
2020	37225165130.15184
2021	29326065929.391747
2022	30487445494.159435
2023	24461133250.354195