The Joint Research Centre for the European Commission published a report on 5 August 2016 containing analysis on residential gas and electricity consumption trends for the EU-28, as well as information on district heating and the energy efficiency of household products.
The information is covered in Chapter 4. For example, on page 43 the authors state that “during the period 2000-2014, the final residential energy consumption in the EU-
28 has dropped by -9.5%, from 291 Mtoe to 263 Mtoe [Million Tonnes of Oil Equivalent].”
See the full report at Energy Consumption and Energy Efficiency Trends in the EU-28 2000-2014