Year of construction	Income quintile per unit of consumption	Implementation of energy efficiency improvements in households	Total
Total	Total	Improvement have been made	19.5
Total	Total	No, it doesn't need it	46.0
Total	Total	No, but it would be necessary	34.4
Total	First quintile	Improvement have been made	14.0
Total	First quintile	No, it doesn't need it	45.0
Total	First quintile	No, but it would be necessary	41.0
Total	Second quintile	Improvement have been made	15.8
Total	Second quintile	No, it doesn't need it	45.6
Total	Second quintile	No, but it would be necessary	38.7
Total	Third quintile	Improvement have been made	19.0
Total	Third quintile	No, it doesn't need it	44.8
Total	Third quintile	No, but it would be necessary	36.3
Total	Fourth quintile	Improvement have been made	23.1
Total	Fourth quintile	No, it doesn't need it	45.5
Total	Fourth quintile	No, but it would be necessary	31.4
Total	Fifth quintile	Improvement have been made	25.5
Total	Fifth quintile	No, it doesn't need it	49.2
Total	Fifth quintile	No, but it would be necessary	25.3
1960 or earlier	Total	Improvement have been made	23.4
1960 or earlier	Total	No, it doesn't need it	35.2
1960 or earlier	Total	No, but it would be necessary	41.3
1960 or earlier	First quintile	Improvement have been made	14.8
1960 or earlier	First quintile	No, it doesn't need it	34.0
1960 or earlier	First quintile	No, but it would be necessary	51.2
1960 or earlier	Second quintile	Improvement have been made	19.1
1960 or earlier	Second quintile	No, it doesn't need it	36.8
1960 or earlier	Second quintile	No, but it would be necessary	44.2
1960 or earlier	Third quintile	Improvement have been made	26.9
1960 or earlier	Third quintile	No, it doesn't need it	30.0
1960 or earlier	Third quintile	No, but it would be necessary	43.1
1960 or earlier	Fourth quintile	Improvement have been made	29.4
1960 or earlier	Fourth quintile	No, it doesn't need it	34.4
1960 or earlier	Fourth quintile	No, but it would be necessary	36.2
1960 or earlier	Fifth quintile	Improvement have been made	31.4
1960 or earlier	Fifth quintile	No, it doesn't need it	41.1
1960 or earlier	Fifth quintile	No, but it would be necessary	27.5
1961-1980	Total	Improvement have been made	23.9
1961-1980	Total	No, it doesn't need it	37.0
1961-1980	Total	No, but it would be necessary	39.1
1961-1980	First quintile	Improvement have been made	16.1
1961-1980	First quintile	No, it doesn't need it	37.4
1961-1980	First quintile	No, but it would be necessary	46.4
1961-1980	Second quintile	Improvement have been made	20.2
1961-1980	Second quintile	No, it doesn't need it	37.8
1961-1980	Second quintile	No, but it would be necessary	42.0
1961-1980	Third quintile	Improvement have been made	21.4
1961-1980	Third quintile	No, it doesn't need it	37.5
1961-1980	Third quintile	No, but it would be necessary	41.1
1961-1980	Fourth quintile	Improvement have been made	30.6
1961-1980	Fourth quintile	No, it doesn't need it	34.5
1961-1980	Fourth quintile	No, but it would be necessary	34.9
1961-1980	Fifth quintile	Improvement have been made	32.4
1961-1980	Fifth quintile	No, it doesn't need it	37.6
1961-1980	Fifth quintile	No, but it would be necessary	30.0
1981-2000	Total	Improvement have been made	19.4
1981-2000	Total	No, it doesn't need it	45.7
1981-2000	Total	No, but it would be necessary	34.9
1981-2000	First quintile	Improvement have been made	12.5
1981-2000	First quintile	No, it doesn't need it	45.5
1981-2000	First quintile	No, but it would be necessary	42.0
1981-2000	Second quintile	Improvement have been made	13.5
1981-2000	Second quintile	No, it doesn't need it	45.9
1981-2000	Second quintile	No, but it would be necessary	40.5
1981-2000	Third quintile	Improvement have been made	18.8
1981-2000	Third quintile	No, it doesn't need it	45.8
1981-2000	Third quintile	No, but it would be necessary	35.4
1981-2000	Fourth quintile	Improvement have been made	22.2
1981-2000	Fourth quintile	No, it doesn't need it	45.0
1981-2000	Fourth quintile	No, but it would be necessary	32.8
1981-2000	Fifth quintile	Improvement have been made	27.5
1981-2000	Fifth quintile	No, it doesn't need it	46.0
1981-2000	Fifth quintile	No, but it would be necessary	26.5
2001-2010	Total	Improvement have been made	14.9
2001-2010	Total	No, it doesn't need it	58.1
2001-2010	Total	No, but it would be necessary	26.9
2001-2010	First quintile	Improvement have been made	11.7
2001-2010	First quintile	No, it doesn't need it	60.9
2001-2010	First quintile	No, but it would be necessary	27.4
2001-2010	Second quintile	Improvement have been made	12.4
2001-2010	Second quintile	No, it doesn't need it	57.6
2001-2010	Second quintile	No, but it would be necessary	30.0
2001-2010	Third quintile	Improvement have been made	13.5
2001-2010	Third quintile	No, it doesn't need it	57.1
2001-2010	Third quintile	No, but it would be necessary	29.4
2001-2010	Fourth quintile	Improvement have been made	15.7
2001-2010	Fourth quintile	No, it doesn't need it	57.7
2001-2010	Fourth quintile	No, but it would be necessary	26.7
2001-2010	Fifth quintile	Improvement have been made	19.1
2001-2010	Fifth quintile	No, it doesn't need it	58.0
2001-2010	Fifth quintile	No, but it would be necessary	22.9
2011 or later	Total	Improvement have been made	12.5
2011 or later	Total	No, it doesn't need it	70.8
2011 or later	Total	No, but it would be necessary	16.7
2011 or later	First quintile	Improvement have been made	12.3
2011 or later	First quintile	No, it doesn't need it	69.4
2011 or later	First quintile	No, but it would be necessary	18.3
2011 or later	Second quintile	Improvement have been made	10.5
2011 or later	Second quintile	No, it doesn't need it	69.2
2011 or later	Second quintile	No, but it would be necessary	20.3
2011 or later	Third quintile	Improvement have been made	13.3
2011 or later	Third quintile	No, it doesn't need it	67.1
2011 or later	Third quintile	No, but it would be necessary	19.6
2011 or later	Fourth quintile	Improvement have been made	11.6
2011 or later	Fourth quintile	No, it doesn't need it	70.9
2011 or later	Fourth quintile	No, but it would be necessary	17.5
2011 or later	Fifth quintile	Improvement have been made	13.9
2011 or later	Fifth quintile	No, it doesn't need it	74.5
2011 or later	Fifth quintile	No, but it would be necessary	11.6