The indicator is computed as below:
= [Indigenous production + imports - exports - international marine bunkers +/- stock changes]/ [GDP (Constant 2005 PPP $)/1,000]
Indigenous Production is the production of primary energy, i.e. hard coal, lignite, peat, crude oil, NGLs, natural gas, nuclear, hydro, geothermal, solar and the heat from heat pumps that is extracted from the ambient environment. Production is calculated after removal of impurities (e.g. sulphur from natural gas). Calculation of production of hydro, geothermal, etc. and nuclear electricity is explained in Section III, Units and Conversions of Energy Balances of OECD Countries of the International Energy Agency (IEA) Statistics publications.
Imports and exports comprise amounts having crossed the national territorial boundaries of the country, whether or not customs clearance has taken place.
International marine bunkers cover those quantities delivered to sea-going ships of all flags, including warships. Consumption by ships engaged in transport in inland and coastal waters is not included.
Stock changes reflect the difference between opening stock levels at the first day of the year and closing levels on the last day of the year of stocks on national territory held by producers, importers, energy transformation industries and large consumers. A stock build is shown as a negative number, and a stock draw as a positive number.
For additional information on the methodology of the energy use indicator, refer to the IEA’s website:
Constant 2005 PPP gross domestic product (GDP) is GDP measured in constant local currency converted to constant 2005 U.S. dollars using PPP rates.