Year current international $ 2000 190.485104876983 2001 188.342041202437 2002 193.313486004318 2003 219.66106653833 2004 234.872120702638 2005 243.360182522091 2006 260.839461288844 2007 280.855478443969 2008 286.558432788155 2009 286.324087655982 2010 303.560704137802 2011 334.900804013419 2012 363.950777909867 2013 377.034257154728 2014 409.021294813123 2015 432.200188123888 2016 450.573098428817 2017 464.896910996886 2018 503.506324332499 2019 527.905539434556 2020 519.490070387451 2021 555.254971055504