Subsample

household income versus household size

household electricity use versus household size

household income versus household electricity use

High-income group in1985

0.101*

0.073*

0.279*

High-income group in 2015

0.007

0.441*

0.088*

Low-income group in 1985

0.435*

0.413*

0.410*

Low-income group in 2015

0.375*

0.448*

0.328*