Year constant 2021 international $ 1995 1228.1897360250132 1996 1261.152447292219 1997 1299.828122244958 1998 1324.9785088295137 1999 1449.3044366667027 2000 1557.6618910138031 2001 1650.3242264081466 2002 1712.6238576565554 2003 1836.3886263053334 2004 1986.0854985755743 2005 2196.734583069133 2006 2395.4935706620677 2007 2611.4204400026706 2008 2721.5990880578242 2009 2674.139587754806 2010 2820.319420985578 2011 2953.1529861236895 2012 3096.6794629850783 2013 3253.885006593367 2014 3437.2082142251925 2015 3629.062277075444 2016 3839.195285409704 2017 4057.349822747748 2018 4284.367097334925 2019 4508.785684742653 2020 4415.429930831589 2021 4425.366927605692 2022 4612.258422361769 2023 4931.016841741933