Year current international $ 2002 74.6153372488365 2003 74.24357185944 2004 79.4161805886963 2005 83.6188667540828 2006 90.8889156263186 2007 87.7596183038502 2008 103.833109370031 2009 111.747603898079 2010 117.516289157686 2011 107.93355425442 2012 115.738926552442 2013 128.302129663415 2014 147.764047185105 2015 169.090389755466 2016 181.722071863739 2017 199.684629319953 2018 228.507093020007 2019 246.970339259762 2020 241.274501276357 2021 280.758937797717