Oct 07: IMF forecasts 2008 world growth of 4.75% [http://www.imf.org/external/pubs/ft/survey/so/2007/res1017b.htm]
Actual 2008 world growth: 3.2%
Jul 08: IMF forecasts 2009 world growth 3.9% Oct 08: IMF forecasts 2009 world growth 3% Jan 09: IMF forecasts 2009 world growth 0.5% Apr 09: IMF forecasts 2009 world growth -1.3%
Jan 09: IMF forecasts 2010 world growth 3% Apr 09: IMF forecasts 2010 world growth 1.9% [http://www.imf.org/external/pubs/ft/weo/2009/01/pdf/text.pdf]
