Year current international $ 2000 26.091261331158936 2001 27.444751153736856 2002 27.72364916886249 2003 28.28576932077978 2004 30.268379746217708 2005 34.1991127569775 2006 36.79398977368529 2007 38.99272061120772 2008 42.35615493364858 2009 47.008548343740095 2010 48.27862053802219 2011 51.927233383466785 2012 56.19852195034721 2013 56.85509957885364 2014 58.91113924249755 2015 64.72477071130804 2016 67.16739236821711 2017 72.62244961455092 2018 76.73399558011525 2019 82.86724581891882 2020 89.24644166954845 2021 95.35633850838636