Figures exclude natural gas converted to liquid fuels. Derivatives of natural gas and coal consumed in gas-to-liquids transformation are included.
According to the source, this data represents standard cubic meters (measured at 15°C and 1,013 mbar) where possible. Since the figures were derived directly from tons of oil equivalent using an average conversion factor, it does not necessarily equate with gas volumes expressed in specific national terms.
This statistic was compiled using several releases of the publication.
This report was previously published by BP.