Consolidated operating costs

As at 31 December 2012 these amounted to 2,914,167 thousand euros (2,543,047 thousand euros at 31 December 2011), representing an increase of 371,120 thousand euros (+14.6%) over the previous year, and are broken down as follows.

€ thousand 31.12.2012 31.12.2011 Absolute increase/ (Decrease) Increase/ (decrease) %
Staff costs 282,069 278,254 3,814 1.4%
Costs of materials and overheads 2,632,098 2,264,793 367,305 16.2%
Consolidated operating costs 2,914,167 2,543,047 371,120 14.6%

The change in the period was from the change in the basis of consolidation, particularly with regard to winding-up of the joint venture.