Year constant 2011 international $ 1990 37140.0246568536 1991 38562.9606176892 1992 38669.3749013174 1993 39051.995974397 1994 39944.1114331306 1995 39113.471647732 1996 38209.1954261706 1997 39824.2909203858 1998 39767.7893949072 1999 39478.4943294997 2000 41621.2326674911 2001 39495.5577972876 2002 37360.4757716201 2003 37303.3326851659 2004 39553.3740743505 2005 39515.814603003 2006 39612.976748349 2007 40171.5234529023 2008 40081.2323667298 2009 35830.4979582943 2010 34437.4941743467 2011 35492.6184873268 2012 34830.9765514284 2013 36082.5224859839 2014 36172.9333549571 2015 35814.2614376623 2016 35557.6568622291 2017 35861.8281181686