Year	constant 2010 US$
1993	13049766739.1142
1994	12017201900.504
1995	12271232007.2811
1996	11701572624.3885
1997	11158888828.3696
1998	11444535473.4322
1999	10749925214.7048
2000	10835349317.8844
2001	10560332184.0643
2002	9781497781.70857
2003	11877288233.6502
2004	12682938475.6777
2005	13705526552.0105
2006	13969791339.4112
2007	14999858346.0448
2008	15347690980.5086
2009	15374720570.5062
2010	17197357666.622
2011	16400382784.6675
2012	19405204656.0249
2013	21615005270.3599
2014	23202041735.6358
2015	24609170060.0373
2016	24102988925.8878
2017	23820589408.6898
2018	24363258877.063