Year U.S. dollars (Billions) 1992 12.800 1993 11.408 1994 15.687 1995 10.532 1996 14.494 1997 14.091 1998 15.215 1999 12.133 2000 10.785 2001 12.778 2002 15.092 2003 18.420 2004 23.928 2005 31.239 2006 38.219 2007 46.815 2008 62.798 2009 50.855 2010 57.220 2011 61.368 2012 65.669 2013 75.496 2014 78.736 2015 56.329 2016 47.703 2017 54.723 2018 60.011 2019 64.414 2020 61.312 2021 68.207 2022 72.835 2023 71.805 2024 69.048 2025 70.815 2026 73.435 2027 76.402 2028 80.005 2029 83.378