Year current international $ 2000 0.7763256403442538 2001 1.3298163984723375 2002 0.9260996102041887 2003 1.0696841113673632 2004 1.4821574696919042 2005 1.6813820099213583 2006 1.7236605324100738 2007 1.8170502553223697 2008 1.4982547164092155 2009 1.804329006992582 2010 1.5863342811134749 2011 1.5479824070877064 2012 1.7637158025259159 2013 2.1891084283055338 2014 2.858737033096919 2015 1.8301752467477441 2016 2.1642075860347423 2017 1.8768068495526191 2018 1.4609405746398214 2019 1.6604554863674346 2020 1.5320220591439282 2021 5.613533156620624