Year Purchasing power parity; international dollars (Billions) 2000 2.221 2001 2.456 2002 2.607 2003 2.890 2004 3.209 2005 3.488 2006 3.769 2007 3.931 2008 3.784 2009 3.606 2010 3.577 2011 3.651 2012 3.571 2013 3.563 2014 3.718 2015 3.784 2016 4.072 2017 4.215 2018 4.380 2019 4.543 2020 4.088 2021 4.630 2022 5.430 2023 5.756 2024 6.001 2025 6.198 2026 6.410 2027 6.629 2028 6.856 2029 7.091