Year U.S. dollars (Billions) 1998 4.838 1999 6.044 2000 7.261 2001 6.693 2002 6.496 2003 8.336 2004 10.095 2005 11.382 2006 12.752 2007 16.760 2008 23.907 2009 28.971 2010 35.748 2011 50.292 2012 55.131 2013 59.176 2014 63.153 2015 62.655 2016 60.090 2017 61.267 2018 66.699 2019 68.802 2020 77.801 2021 68.054 2022 61.766 2023 64.496 2024 68.006 2025 73.539 2026 79.529 2027 86.119 2028 93.251 2029 100.968