Year	constant 2010 US$
1990	22672997489.2598
1991	22514286515.89
1992	17426057674.4447
1993	13400638430.3151
1994	10760712656.9963
1995	9490948466.69312
1996	9614330815.71948
1997	10171962053.4008
1998	11189158287.0384
1999	12017156065.3636
2000	13351060298.9158
2001	14672815268.5084
2002	16057770026.7758
2003	17696995366.1973
2004	19334640158.1058
2005	24740902926.3267
2006	33268154327.4079
2007	41739296291.7775
2008	46160087685.6421
2009	50485058386.531
2010	52902703376.1056
2011	52070545110.5105
2012	53217627468.0711
2013	56326959563.0229
2014	57902587621.89
2015	58510999630.176
2016	56718105558.8029
2017	56558154150.4872
2018	57357249337.7948