The index measures the monthly evolution of the volume of industrial production (excluding construction). Since January 2009 the indices have been calculated with reference to the base year 2005 using the new Ateco 2007 classification (Italian edition of Nace Rev. 2).
In July 2011 the industrial production index seasonally adjusted decreased by 0.7% compared with the previous month. The percentage change of the average of the last three months with respect to the previous three months decreased by 0.4.
The calendar adjusted industrial production index decreased by 1.6% compared with July 2010 (calendar working days being 21 versus 22 days in July 2010); in the period January- July 2011 the percentage change was +1.4 compared with the same period of 2010.
The unadjusted index of industrial production decreased by 4.6% compared with July 2010.
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