Year current US$ 2002 407977858.449047 2003 508521721.228887 2004 598362792.761989 2005 557270620.34854 2006 621861789.955951 2007 688761877.467172 2008 763053748.013844 2009 727757245.927409 2010 650741021.160953 2011 722369036.50157 2012 633487534.97907 2013 671653930.200302 2014 660117942.379609 2015 564273664.829532 2016 581560094.176844 2017 581560094.176844 2018 581560094.176844 2019 581560094.176844 2020 581560094.176844 2021 581560094.176844 2022 581560094.176844 2023 600000000