Year U.S. dollars (Billions) 1996 3.584 1997 4.578 1998 5.281 1999 5.766 2000 5.554 2001 5.784 2002 6.711 2003 8.477 2004 10.157 2005 10.935 2006 12.460 2007 15.323 2008 18.712 2009 17.601 2010 17.164 2011 18.629 2012 17.207 2013 18.155 2014 18.522 2015 16.404 2016 17.117 2017 18.326 2018 20.484 2019 20.483 2020 20.226 2021 23.673 2022 24.535 2023 27.216 2024 29.078 2025 30.754 2026 32.436 2027 34.052 2028 35.720 2029 37.722