Year current international $ 1990 26299.136123524255 1991 27460.31274336923 1992 29068.19961937444 1993 30235.847780336386 1994 31149.112325604383 1995 32791.9751291977 1996 33828.87947883123 1997 35909.55670690173 1998 36714.488225934954 1999 36826.4369265061 2000 39585.97960331571 2001 41750.437218174135 2002 41426.444067489436 2003 40644.537170933516 2004 41638.88166261715 2005 43203.00096085799 2006 46094.63130961472 2007 48596.521112760034 2008 52678.19166765479 2009 55273.160700838016 2010 53263.22683818831 2011 50267.64685708659 2012 50152.422407120765 2013 47225.74742134109 2014 44160.497599677044 2015 35998.975410181716 2016 33279.34638505341 2017 33586.50009951277 2018 37753.39858826521 2019 37157.322041911626 2020 35001.51467680442 2021 38930.993837957685 2022 42938.44457428819 2023 44421.19796003112