Table 1. Annual Electricity Consumption Percentiles by Census Division, 1997
(kilowatthours per household)
  5th percentile 10th percentile 25th percentile   median   75th percentile 90th percentile 95th percentile
All Households 2,287 3,167 5,056 8,370 13,485 19,866 24,436
Census Division  
New England 1,911 2,470 3,580 5,739 8,723 12,473 16,609
Middle Atlantic 1,682 2,287 3,573 5,608 9,653 14,344 19,137
East North Central 2,311 3,252 4,705 7,378 10,749 15,390 18,789
West North Central 2,765 3,413 5,425 8,385 12,700 18,116 25,168
South Atlantic 3,745 5,227 7,800 11,861 17,440 22,418 25,509
East South Central 3,978 5,706 8,941 13,286 19,545 26,914 30,900
West South Central 3,704 5,065 7,939 12,220 17,477 25,927 29,632
Mountain 2,756 3,336 5,301 7,976 12,161 17,944 21,154
Pacific 1,778 2,345 3,831 6,333 10,440 16,839 20,821
Graph of data

Notes: The data in this table are for households that used electricity.
The percentiles describe the distribution of household electricity consumption data; for example, 25% of households in New England consumed less than 3,580 kWh and 75% consumed more than that amount.
Source: 1997 Residential Energy Consumption Survey.

Return to: “Median Values and Percentiles for Household Energy Data”
 

Table 2. Mean Annual Electricity Consumption by Census Division, 1997
(kilowatthours per household)
  Electricity Consumption per Household (kWh) Relative Standard Error (percent) Standard Error (kWh) 95% confidence level lower bound (kWh) 95% confidence level upper bound (kWh)
All Households 10,219 1.4 430 9,939 10,499
Census Division
New England 7,062 5.5 388 6,301 7,824
Middle Atlantic 7,313 4.4 322 6,682 7,944
East North Central 8,631 5.0 432 7,785 9,476
West North Central 10,181 6.6 672 8,864 11,498
South Atlantic 13,077 2.9 379 12,334 13,820
East South Central 14,890 6.4 953 13,023 16,758
West South Central 13,826 4.5 622 12,606 15,045
Mountain 9,424 4.5 424 8,593 10,256
Pacific 8,203 2.9 238 7,737 8,669
Graph of data

Notes: The data in this table are for households that used electricity.
The standard error is a measure of sampling error and can be used to calculate a confidence range. For example, the estimate for electricity consumption for New England is 7,062 kWh and the standard error is 388 kWh. The 95% confidence interval is calculated by multiplying 1.96 times the standard error, and the 95% confidence range is 6,301kWh to 7,824 kWh.
Source: 1997 Residential Energy Consumption Survey.

Return to: “Median Values and Percentiles for Household Energy Data”