Year current international $ 1990 4962.537624599687 1991 5115.148146593487 1992 5571.163454092268 1993 5958.338268530079 1994 6207.841612403947 1995 6446.625146983318 1996 6501.576463136499 1997 6820.684648844323 1998 7232.2728371146695 1999 7487.001658657146 2000 7797.391994825971 2001 8100.610883835518 2002 8364.364842690686 2003 8757.563553633041 2004 9249.225705359544 2005 9773.590702422995 2006 10659.325541961674 2007 11682.48693224611 2008 12300.287698938679 2009 12103.499764626347 2010 12742.164001293138 2011 13410.354536261559 2012 14241.867694113975 2013 14992.422045862879 2014 16132.657875711107 2015 17248.747396874758 2016 18898.075223414027 2017 20168.220481134595 2018 21144.409774032483 2019 22949.52865933445 2020 21716.870243268495 2021 23700.296131391682 2022 26181.142017213908 2023 27952.47662351868