Year	constant 2010 US$
1990	18429958007.8968
1991	17221807994.3
1992	15530802625.6807
1993	14525122067.6207
1994	12922680336.4828
1995	11749359585.0547
1996	12145348263.7681
1997	13336297674.1674
1998	14866104704.536
1999	16088907327.5959
2000	17260523696.0013
2001	19631458458.6108
2002	21246880319.5323
2003	22459312646.2778
2004	24139796729.2589
2005	27032218418.3393
2006	29886228617.6487
2007	33256285758.307
2008	37969607037.8194
2009	37966069421.0777
2010	41009331990.6009
2011	41463547348.3909
2012	44948669179.0818
2013	48701540785.1013
2014	50258914819.4173
2015	49274858047.71
2016	48066527349.3656
2017	49736146076.4249
2018	52857582737.1634