Year constant 2021 international $ 1990 6962.550508631043 1991 6919.936111823045 1992 7535.630444931813 1993 7801.453143851213 1994 7903.357929700876 1995 8198.388800782424 1996 8596.218014804303 1997 9197.754515885108 1998 9635.914653445785 1999 10024.407974376576 2000 10353.184058253028 2001 10448.340572053448 2002 10767.659653324923 2003 10216.296707399732 2004 10150.525447734479 2005 11325.451984526528 2006 12264.656581954052 2007 13001.00865575004 2008 13444.364630655598 2009 13390.446469793795 2010 14320.52957039581 2011 14541.64959835368 2012 14735.183437281 2013 15141.73888723118 2014 15996.436845574533 2015 17005.645592868263 2016 17886.716579772376 2017 18432.453250508817 2018 19597.954650876796 2019 20306.196661398586 2020 18728.545812739896 2021 20827.525623247922 2022 21878.210110287757 2023 22023.510592391456