Year	current US$
1990	3322109026.15018
1991	3134397247.17957
1992	3298038065.00351
1993	3085602800.78075
1994	3075252944.00119
1995	3399294474.6144
1996	3160671488.02878
1997	2616691896.70852
1998	2450749012.85576
1999	2260126278.64852
2000	1890208781.33645
2001	1803584187.3544
2002	1919957389.18692
2003	2290421324.9382
2004	2490205896.8711
2005	2522373810.52838
2006	2517521869.89007
2007	2842717086.21964
2008	3120442043.40207
2009	3060923367.42905
2010	2918890863.37258
2011	3100845836.63346
2012	2808694689.09702
2013	2872697460.34385
2014	2778056502.1786
2015	2305517056.73767
2016	2270803160.35753
2017	2315291263.30861
2018	2518217180.63852
2019	2472387741.41924
2020	2541985361.08465
2021	2697251293.63787