Year	current US$
1995	2820062536.358899
1996	3258573766.598442
1997	3877980927.091055
1998	3726071053.5332813
1999	3622140322.6835546
2000	4174221327.996965
2001	4152830735.540172
2002	3522317557.885189
2003	3753539676.3467097
2004	4383718301.715432
2005	5360597141.688307
2006	6255899460.57785
2007	7537670548.099669
2008	8303470139.769428
2009	7585596754.236127
2010	9361925500.825632
2011	11074012737.062016
2012	12556666007.751535
2013	13502953652.318161
2014	13211317589.445257
2015	12034181987.343983
2016	11953000221.681826
2017	14114464732.436752
2018	14118523820.719862
2019	12893490964.49056