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Appendix E - Data Source and Accuracy Statements

Chapter 4 - Energy and the Environment

Table A
Average Response Rates for Monthly Surveys, 2007

Survey Site Average universe site Average number of respondents Percent
Refinery  153 153 99.8
Bulk terminal  220 220 99.9
Pipeline  75 75 100.0
Crude oil stocks 133 133 99.8

NOTE: The average response rate is calculated by summing individual monthly response rates and dividing by 12.

SOURCE: Tammy G. Heppner and Carol L. French, Energy Information Administration, U.S. Department of Energy, Accuracy of Petroleum Supply Data (Washington, DC:2009).