Year constant 2021 international $ 1990 36268.00125670515 1991 36436.62863326336 1992 36855.62280014535 1993 36884.36017294098 1994 37684.59255818098 1995 38551.86577856894 1996 39483.597956336125 1997 40582.11277856519 1998 41600.72642028627 1999 42788.51913815725 2000 44180.043071338674 2001 44774.1612347853 2002 45197.27231716149 2003 45834.83529333131 2004 47147.946900962925 2005 48095.03474432862 2006 49361.43071286099 2007 50099.84334307615 2008 49370.32032544417 2009 47895.691252257086 2010 49152.218344115136 2011 49748.00315815779 2012 50215.51087989606 2013 50633.327093278436 2014 51441.45620098918 2015 52539.41291968742 2016 53220.29755776115 2017 54377.82502818245 2018 55361.79500737632 2019 56237.790909727446 2020 53847.30173926074 2021 56946.08526787508 2022 57818.31233349121