The following table shows World Bank estimates for world GDP from 2005 to 2014, both in nominal and real terms (real GDP is calculated using a fixed weights method, using 2005 as a base year). How do you explain the discrepancy between nominal and real GDP in 2014? How do you explain the evolution of world’s real GDP growth rate from 2005 to 2014?

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Year 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2005 Constant World GDP (Trillions, US$) 47.033 48.971 50.899 51.652 50.582 52.646 54.142 55.351 56.652 58.054 Current World GDP (Trillions, US$) 47.033 50.971 57.452 62.982 59.704 65.489 72.572 74.041 76.123 77.868 Real GDP (% Change) 4.1% 3.9% 1.5% -2.1% 4.1% 2.8% 2.2% 2.4% 2.5% Nominal GDP (% Change) 8.4% 12.7% 9.6% -5.2% 9.7% 10.8% 2.0% 2.8% 2.3%