Notes: The data in this table are for households that used natural gas.
The percentiles describe the distribution of household natural gas consumption data; for example, 25% of households with incomes less than 10,000 dollars consumed less than 27 thousand cubic feet (cf) 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 Natural Gas Consumption by Household Income, 1997
(thousand cubic feet per household)

	Natural Gas Consumption per Household (1,000 cf)	Relative Standard Error (percent)	Standard Error (1,000 cf)	95% confidence level lower bound (1,000 cf)	95% confidence level upper bound (1,000 cf)
All Households	83	1.8	1	80	86
Household Income
Less than 10,000 Dollars	65	5.2	3	58	71
10,000 to 14,999 Dollars	71	5.0	4	64	78
15,000 to 19,999 Dollars	74	3.4	3	69	79
20,000 to 24,999 Dollars	80	4.1	3	74	87
25,000 to 34,999 Dollars	82	3.8	3	76	88
35,000 to 49,999 Dollars	87	3.4	3	81	93
50,000 to 74,999 Dollars	96	2.9	3	90	101
More than 75,000 Dollars	100	4.5	4	91	109

Graph of data

Notes: The data in this table are for households that used natural gas.
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 households with incomes less than 10,000 dollars is 65 thousand cubic feet (cf) and the standard error is 3 thousand cf. The 95% confidence interval is calculated by multiplying 1.96 times the standard error, and the 95% confidence range is 58 thousand cf to 71 thousand cf.
Source: 1997 Residential Energy Consumption Survey.

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