Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

 Find the latest Coronavirus-related transportation statistics on the BTS COVID-19 landing page.

United States Department of Transportation United States Department of Transportation

Appendix C Data Source and Accuracy Statements

Wednesday, November 21, 2012

Appendix C Data Source and Accuracy Statements

Chapter 4 Energy and the Environment

Table A
Average Response Rates for Monthly Surveys, 1998

Survey Site Average universe site Average number of respondents Percent
Refinery 252 243 96.3
Bulk terminal 300 287 95.6
Pipeline  81  80 99.3
Crude oil stocks 174 169 99.1

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:1998).