Year	current US$
1988	441290496.416184
1989	649495892.169191
1990	460332892.536536
1991	520965718.877935
1992	872821123.285235
1993	1223783032.67255
1994	1407665885.37742
1995	1680844581.62143
1996	2000809209.21726
1997	2918978487.32199
1998	2689177524.70928
1999	2370234795.05546
2000	2320907240.04561
2001	2416244245.29208
2002	2389968734.68149
2003	2624941565.17496
2004	2882719825.90735
2005	3048242359.49968
2006	3663627050.63016
2007	3938985247.3476
2008	4451156827.62074
2009	5217677965.45515
2010	6130568435.72686
2011	7241241602.78403
2012	8155395835.23491
2013	8600650416.5113
2014	8712411439.06348
2015	8902759802.42538
2016	8665683765.08663
2017	9062258180.62513
2018	9899568801.24316
2019	10157579206.6794
2020	6475848127.3619
2021	4924850862.39802