Year Purchasing power parity; international dollars (Billions) 2000 5.003 2001 5.172 2002 5.352 2003 5.594 2004 5.997 2005 6.445 2006 7.215 2007 7.914 2008 8.648 2009 8.196 2010 8.520 2011 8.974 2012 8.604 2013 9.237 2014 9.558 2015 10.164 2016 11.324 2017 12.263 2018 13.181 2019 13.947 2020 11.968 2021 14.150 2022 16.116 2023 17.706 2024 18.812 2025 19.718 2026 20.692 2027 21.715 2028 22.789 2029 23.922