Year current international $ 2000 1.0030627412968782 2001 1.3643915377172422 2002 1.4186434238323766 2003 1.8771593121812176 2004 3.309585075220154 2005 3.544878043548944 2006 2.7111059656861896 2007 3.211146619232207 2008 3.2520388427317912 2009 3.4662745773851658 2010 3.3366390869184896 2011 3.3702200537616447 2012 3.1400358340403356 2013 3.1878627636718146 2014 2.5003601366218824 2015 1.9022910048131085 2016 1.6266972134077418 2017 1.594444271296255 2018 1.3966920095319402 2019 1.5524486151080503 2020 1.3913248872661101 2021 3.078015147655867