Year current international $ 2000 20.7908316801723 2001 24.2090359746162 2002 24.1814206945405 2003 24.3638800182439 2004 24.3282134902272 2005 25.9191172659563 2006 31.2784490845244 2007 39.0339906296278 2008 36.6597349173034 2009 42.3668311815029 2010 55.2210840978529 2011 49.7865101080628 2012 54.0865501906936 2013 51.391186758336 2014 60.0466321745342 2015 62.3511648788697 2016 66.5580400886577 2017 68.6518966831107 2018 69.9346935792027 2019 73.5285848324948 2020 82.7200439168823 2021 81.736976506229