Year current international $ 1990 7030.765823158455 1991 7270.4057877170035 1992 7470.3937648223155 1993 7823.469387729818 1994 8133.502791556436 1995 8587.014116687165 1996 8949.485999206947 1997 9309.4440178963 1998 9629.636594591302 1999 9897.353000728555 2000 10466.84323132869 2001 10911.455744370438 2002 11377.208258206554 2003 11896.710253073641 2004 12585.739263439504 2005 13316.497262631348 2006 14411.072769909058 2007 15509.290910518075 2008 16102.513689265983 2009 15741.44330115727 2010 16200.227167366944 2011 16936.315624159484 2012 17518.39825557714 2013 17833.73772964897 2014 18203.09265245211 2015 17881.14433541072 2016 18484.88475360417 2017 19748.12593382984 2018 20621.680189639228 2019 22123.105642580213 2020 20775.161188661168 2021 22995.380888782187 2022 26204.10077302298 2023 28262.77088522848