Year current US$ 2000 127.69557035 2001 118.89828774 2002 121.21288593 2003 133.78239368 2004 168.69400237 2005 197.05653659 2006 236.4737128 2007 274.6497854 2008 316.31362722 2009 345.96943077 2010 410.14341771 2011 469.05887395 2012 518.40478861 2013 563.98757457 2014 548.99207361 2015 544.16385062 2016 585.77155329 2017 689.32198494 2018 740.61149475 2019 697.30279388 2020 720.85260222 2021 844.40287884 2022 755.39497175