Year current international $ 2000 53.069191688227335 2001 56.7463579951761 2002 61.38098054807743 2003 65.96339944703347 2004 71.0518803961178 2005 77.13735889289912 2006 85.46113140278247 2007 90.28023616819783 2008 94.02409605657704 2009 101.51759580262707 2010 102.77222305394676 2011 106.52850716413847 2012 109.9989331560583 2013 119.39975991701664 2014 125.84277627215522 2015 130.48517083738682 2016 137.72994063661105 2017 137.48657107925533 2018 140.2738942060956 2019 148.22215736551533 2020 150.92809862585 2021 162.96591100083708