Year constant 2021 international $ 1990 5970.117369369136 1991 5989.364540876373 1992 6098.912302760335 1993 6285.094665917649 1994 6439.470479242092 1995 6598.072014361991 1996 6884.946060311095 1997 7181.206875887238 1998 7245.5532610558175 1999 7372.926754981139 2000 7724.457726807868 2001 7899.967258066567 2002 8190.826366471805 2003 8572.496760412736 2004 9161.44255757282 2005 9719.03945262608 2006 10422.953828238253 2007 11259.363381958514 2008 11815.79537576393 2009 12014.065231129636 2010 12887.545629234373 2011 13626.47842709629 2012 14231.449161375725 2013 14848.053279332293 2014 15372.588095866813 2015 15859.324815495833 2016 16418.67185154386 2017 17112.11981353187 2018 17771.404454065494 2019 18332.641945419113 2020 18039.83821210105 2021 19290.94713584087 2022 19874.74108984906 2023 20657.989182825593