Year constant 2021 international $ 1990 6634.511269440954 1991 6494.39596168715 1992 6275.511998394514 1993 6336.8000621709625 1994 6391.332732350231 1995 6602.175439357643 1996 6804.233400022984 1997 7058.356899348503 1998 7104.503452170611 1999 7360.343068662021 2000 7818.579099574483 2001 8150.1887142354635 2002 8560.49613851114 2003 9075.571839385802 2004 9732.697070750593 2005 10385.445676496018 2006 11243.78037090696 2007 12264.980549105485 2008 12992.398974819196 2009 13216.609917236885 2010 14122.613979368398 2011 14977.445628382507 2012 15696.724317119708 2013 16384.001354351698 2014 17036.250301407654 2015 17600.296609552453 2016 18193.364941125765 2017 18981.360684276417 2018 19854.79221012572 2019 20634.596300198195 2020 20499.109404765757 2021 21905.72133963371 2022 22529.90693674007 2023 23430.293960800573