Table 1 Variable values and weights with the three main specifications

Variables

Consumption 1985

13.104

12.758

13.074

0.063

12.999

–

13.051

–

Consumption 1986

13.318

13.093

13.399

0.065

13.394

–

13.435

–

Consumption 1987

13.701

13.297

13.698

0.099

13.511

–

13.508

–

Consumption 1988

13.849

13.526

13.824

0.078

13.884

–

13.897

–

Consumption 1989

13.999

13.753

14.055

0.089

14.088

–

14.084

–

Consumption 1990

14.380

13.977

14.298

0.059

14.252

–

14.240

–

Consumption 1991

14.224

14.281

14.307

0.062

14.511

–

14.532

–

Consumption 1992

14.516

14.308

14.646

0.052

14.636

–

14.650

–

Consumption 1993

14.708

14.197

14.623

0.058

14.473

–

14.479

–

Consumption 1994

14.674

14.211

14.655

0.068

14.640

–

14.613

–

Consumption 1995

14.607

14.287

14.648

0.118

14.550

–

14.560

–

Consumption 1996

14.600

14.361

14.655

0.057

14.511

–

14.568

–

Consumption 1997

14.901

14.281

14.683

0.067

14.748

–

14.798

–

Consumption 1998

14.746

14.517

14.893

0.066

14.930

–

14.956

–

Avg. consumption

14.238

13.918

14.247

–

14.223

0.646

14.241

–

Avg. electricity intensity

0.047

0.048

0.048

–

0.047

0.347

0.047

0.324

Electric heating

0.011

0.068

0.062

–

0.021

0.007

0.020

0.499

Electric boiler

0.180

0.283

0.317

–

0.235

0.000

0.230

0.001

Rooms per apartment

3.079

3.611

3.730

–

3.357

0.000

3.289

0.000

Avg. income

69018

61027

62746

–

61799

0.000

62054

0.016

Working-age population

0.673

0.668

0.668

–

0.679

0.000

0.684

0.015

Avg. age

43.112

39.074

39.136

–

41.108

0.000

41.629

0.061

Heating-degree days

3039.771

3505.875

3515.670

–

3384.192

0.000

3361.517

0.004

Cooling-degree days

158.812

113.361

99.355

–

115.774

0.000

118.230

0.080