Country of birth of the reference person;Implementation of energy efficiency improvements in households;Total Total;Improvement have been made;19.5 Total;No, it doesn't need it;46.0 Total;No, but it would be necessary;34.4 Spain;Improvement have been made;20.1 Spain;No, it doesn't need it;46.5 Spain;No, but it would be necessary;33.4 Foreign Country (European Union);Improvement have been made;21.4 Foreign Country (European Union);No, it doesn't need it;41.3 Foreign Country (European Union);No, but it would be necessary;37.3 Foreign Country (Rest of World);Improvement have been made;15.9 Foreign Country (Rest of World);No, it doesn't need it;44.7 Foreign Country (Rest of World);No, but it would be necessary;39.4