Year current international $ 2000 14.7324994973617 2001 18.1259481104709 2002 18.4119402941434 2003 23.8296761751309 2004 23.156327010573 2005 22.6132835338249 2006 24.0460484514445 2007 36.7255591843379 2008 23.7266763385524 2009 23.7951591772036 2010 12.0957237047604 2011 17.9337107743546 2012 10.6097715336821 2013 9.40795468729084 2014 42.0719084578823 2015 12.7946642661986 2016 7.34213380259156 2017 6.6216907514283 2018 10.6470870620184 2019 13.2575024310708 2020 12.5646409456219 2021 13.7745058660226