Year current international $ 2000 28.0431105738375 2001 29.448318067202 2002 26.1154573874696 2003 24.6274757798405 2004 27.3583695881623 2005 29.8779569898669 2006 32.8116657290294 2007 31.0542605964624 2008 34.810910437788 2009 33.0542514276067 2010 33.68532229882 2011 32.7563961141626 2012 48.7194224130925 2013 63.6421226610131 2014 79.5069195997403 2015 92.7991724003152 2016 96.4047760153246 2017 97.6269002622281 2018 95.529008397679 2019 101.218604431495 2020 102.86137419367 2021 104.4306492816