Year U.S. dollars (Billions) 2000 9.790 2001 13.009 2002 17.185 2003 22.515 2004 26.017 2005 27.496 2006 32.602 2007 43.395 2008 52.094 2009 45.156 2010 41.369 2011 49.280 2012 43.316 2013 48.394 2014 47.062 2015 39.656 2016 40.693 2017 44.179 2018 50.641 2019 51.514 2020 53.356 2021 62.787 2022 63.563 2023 75.187 2024 81.873 2025 87.738 2026 94.258 2027 100.902 2028 107.914 2029 115.730