Year	current US$
2005	3243950156.6066265
2006	2673043532.474606
2007	3867386599.697705
2008	5439466661.068996
2009	5919873151.762344
2010	6208673454.665083
2011	6844873007.650955
2012	9212387840.340551
2013	6652262606.298319
2014	6248709259.668104
2015	3257009302.275342
2016	1877062875.956719
2017	1711997664.7132752
2018	1637322530.1942604
2019	1237747685.0738082