Year current international $ 1990 7184.242553557423 1991 7990.924543953768 1992 8700.192234061584 1993 9507.37517295524 1994 10139.586867096941 1995 9925.995407133769 1996 10532.74321026917 1997 11445.451086459709 1998 11881.298959634558 1999 11508.15704619241 2000 11544.408971053977 2001 11160.5678020884 2002 9991.382124256637 2003 10975.128235565797 2004 12163.78288577433 2005 13515.227878479893 2006 14898.198166895196 2007 16513.153859352886 2008 17341.267103698017 2009 16249.888435333198 2010 18066.499132576926 2011 19322.227123694192 2012 19629.898037089042 2013 20108.20570087152 2014 19649.3528905429 2015 20058.338638882902 2016 20248.7213872191 2017 23514.66708702488 2018 24498.37892670598 2019 23535.012750940048 2020 22302.150489001575 2021 26086.802355227446 2022 29037.489121502113 2023 29362.692418732186