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  1. Symbols
  2. Note to readers
  3. Acknowledgements
  4. Additional Information
  5. Note of appreciation
  6. Standards of service to the public
  7. Copyright


The following standard symbols are used in Statistics Canada publications:

not available for any reference period
not available for a specific reference period
not applicable
true zero or a value rounded to zero
value rounded to 0 (zero) where there is a meaningful distinction between true zero and the value that was rounded
suppressed to meet the confidentiality requirements of the Statistics Act
use with caution
too unreliable to be published
significantly different from reference category (p < 0.05)

Note to readers

Factors influencing revisions include late receipt of company data and revisions to previously estimated or reported data.The revised data are available in the appropriate CANSIM tables.

Data for any period may be revised and included in subsequent issues (such revisions are incorporated in the CANSIM database). Given that further revisions to submitted data are received after the publication issue of any given year, it should be borne in mind that the statistical series shown in this publication are not necessarily the same in every detail as those shown in other publications produced by the Energy Section of Statistics Canada. From time to time, revisions to previous years may be incorporated in the CANSIM database; tables 128-0016, 128-0017, 128-0012, 128-0013, 128-0014 and 128-0018.


This publication was prepared in the Environment, Energy and Transportation Statistics Division under the direction of Kevin Roberts, Director and Joe St. Lawrence, Section Chief.

Additional Information

For information, please contact the Marketing and Dissemination Section (613) 951-9497 or toll-free (866) 873-8789;

Note of appreciation

Canada owes the success of its statistical system to a long-standing partnership between Statistics Canada, the citizens of Canada, its businesses, governments and other institutions. Accurate and timely statistical information could not be produced without their continued cooperation and goodwill.

Standards of service to the public

Statistics Canada is committed to serving its clients in a prompt, reliable and courteous manner. To this end, Statistics Canada has developed standards of service that its employees observe.

Published by authority of the Minister responsible for Statistics Canada

© Minister of Industry, 2017

All rights reserved. Use of this publication is governed by the Statistics Canada Open License Agreement.

February 2017

Catalogue no. 57-003-X

ISSN 1708-1580

Frequency: Annual


Environment, Energy and Transportation Statistics Division

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