Year	current US$
1990	3316909057.689015
1991	4938792989.214923
1992	6887726438.734463
1993	9132636957.320715
1994	10107442752.21713
1995	12034505270.136917
1996	12764714718.722158
1997	13667424488.470284
1998	14158397817.60427
1999	14419263531.240631
2000	14512769485.903814
2001	14814593698.175787
2002	15895190713.10116
2003	17034825870.646767
2004	17635834109.452736
2005	17629626426.533997
2006	18678880421.227196
2007	21271588530.679935
2008	25665083956.218906
2009	29798131686.23549
2010	33789610059.038143
2011	35933845445.43947
2012	40702402442.45439
2013	43289581011.60863
2014	45494064451.07794
2015	45338426841.791046
2016	45083583340.63019
2017	47515405383.747925
2018	48820796311.111115
2019	48320280146.71815
2020	31758649945.770065
2021	27540367673.330498
2022	29469208905.489033
2023	23270648541.268585