During envisaged in the standard specifications which obliges the technical contact individual - if they detect that the subject matter of the purchase has a significant impact on the energy consumption of the Group - to proceed with the assessment 45% 53% 70% 76% 77% 67% 63% 55% 47% 30% 24% 23% 33% 37% 2010* 2011* 2012* 2013* 2014* 2015 2016 Max.