Year Purchasing power parity; international dollars (Billions) 2000 7.369 2001 7.879 2002 7.966 2003 8.330 2004 8.606 2005 9.276 2006 9.906 2007 11.024 2008 11.440 2009 12.090 2010 12.842 2011 13.935 2012 14.528 2013 15.242 2014 15.679 2015 16.732 2016 17.789 2017 18.691 2018 19.771 2019 21.059 2020 20.197 2021 23.393 2022 26.112 2023 27.957 2024 29.719 2025 31.453 2026 33.295 2027 35.213 2028 37.242 2029 39.396