Year	current US$
2001	21672821592.920353
2002	23139830197.413208
2003	25853443648.740643
2004	27619676405.718178
2005	33195915588.835945
2006	39044114853.64194
2007	60798638529.611984
2008	70583970646.69844
2009	73308153410.48332
2010	71752718202.85909
2011	75168048413.887
2012	77961722260.04085
2013	71052518012.25323
2014	78929978270.93262
2015	83725068454.73111
2016	87307882831.85841
2017	73175615194.00952
2018	73146297944.17972
2019	76782614213.75085
2020	70613018270.93262