Nationality of the reference person;Improvements to thermal insulation or the heating system;Total
Total;Has made improvements to thermal insulation or the heating system;14,1
Total;No improvements have been made and it is warm enough during the cold months;60,8
Total;No improvements have been made and it is not warm enough during the cold months;25,1
Spanish;Has made improvements to thermal insulation or the heating system;14,5
Spanish;No improvements have been made and it is warm enough during the cold months;60,9
Spanish;No improvements have been made and it is not warm enough during the cold months;24,5
Foreign (European Union);Has made improvements to thermal insulation or the heating system;11,6
Foreign (European Union);No improvements have been made and it is warm enough during the cold months;65,4
Foreign (European Union);No improvements have been made and it is not warm enough during the cold months;23,1
Foreign (rest of the world);Has made improvements to thermal insulation or the heating system;8,9
Foreign (rest of the world);No improvements have been made and it is warm enough during the cold months;55,1
Foreign (rest of the world);No improvements have been made and it is not warm enough during the cold months;36
Not specified;Has made improvements to thermal insulation or the heating system;51,5
Not specified;No improvements have been made and it is warm enough during the cold months;48,5
Not specified;No improvements have been made and it is not warm enough during the cold months;..