Year	constant 2010 US$
1990	4474689165.91864
1991	4311446205.05675
1992	3959179067.95108
1993	4021901507.96468
1994	3382365732.79018
1995	3299884630.9722
1996	3349656586.92113
1997	3166900583.19893
1998	3119690280.57128
1999	2896037869.00151
2000	3155257978.02881
2001	3200092321.59796
2002	3292616855.10135
2003	3541919132.10069
2004	4011109888.78135
2005	4109685620.55049
2006	4353898985.89039
2007	4563115842.36881
2008	4955842493.74437
2009	4969886757.5952
2010	5088183954.3471
2011	5427794703.81678
2012	5774918728.18007
2013	5533049921.9843
2014	5685558339.89324
2015	5548326221.85961
2016	5766763349.19152
2017	6020474657.243
2018	5782511613.93348