Year U.S. dollars (Billions) 2001 6.860 2002 7.372 2003 8.247 2004 10.643 2005 12.160 2006 14.874 2007 18.440 2008 21.027 2009 21.588 2010 28.242 2011 36.844 2012 43.190 2013 51.536 2014 54.903 2015 45.048 2016 45.071 2017 50.384 2018 55.191 2019 55.082 2020 25.344 2021 30.969 2022 24.464 2023 47.061 2024 54.677 2025 61.777 2026 66.171 2027 69.827 2028 73.650 2029 77.625