Year	current US$
1989	2942001364.69775
1990	2832505580.86728
1991	3399945044.74573
1992	3398166368.73426
1993	2752989380.53097
1994	2550529242.68878
1995	2573064229.23853
1996	2797985242.16162
1997	2722852866.19756
1998	1808815090.08411
1999	1282120031.48149
2000	1194237475.72926
2001	1590465036.17537
2002	1913556858.61961
2003	2427783646.83087
2004	3353026816.64807
2005	4717615670.33746
2006	6213445029.70298
2007	8371433763.16595
2008	10567973628.8173
2009	6839507804.44527
2010	8145914688.82169
2011	9699385964.5447
2012	11398627047.6764
2013	11924839391.2036
2014	7669334578.5373
2015	4908782819.57852
2016	4283572907.2655
2017	5604196179.94734
2018	6502967190.89905
2019	7829016485.66404
2020	8035667867.21913
2021	9792653192.41855