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).