Year current international $ 1990 6337.90102257574 1991 6202.584655509769 1992 5909.155883376648 1993 5831.828425078967 1994 5239.145070553976 1995 5319.173093393412 1996 5541.2295518799065 1997 5891.578851200281 1998 5197.959399507808 1999 5194.002688372034 2000 5627.585272299385 2001 5828.4889006636195 2002 6164.855540589162 2003 6587.140117233228 2004 7453.582629271712 2005 8164.594565579221 2006 9272.09453509987 2007 10318.505265160735 2008 11107.823982947766 2009 10770.481470159364 2010 11751.784386188085 2011 12874.400184915708 2012 13711.03276091415 2013 14963.732987269672 2014 15514.218355239094 2015 15953.054895076197 2016 16404.90400513345 2017 17214.63602319828 2018 17763.468510477996 2019 18773.54913962158 2020 19290.51187442874 2021 21318.193081416408 2022 24429.382047971667 2023 27375.769248216795