The retail trade index measures the monthly evolution of the turnover at current prices of enterprises with retail sale outlets. With effect from January 2013 the indices are calculated with reference to the base year 2010 using the Ateco 2007 classification (Italian edition of Nace Rev. 2). In April 2016 the seasonally adjusted retail trade index increased by 0.1% with respect to March 2016 (+0.2% for food goods and 0.0% for non-food goods). The average of the last three months decreased with respect to the previous three months (-0.3%). The unadjusted index decreased by 0.5% with respect to April 2015.