Statistics cover production and consumption of oil, coal, natural gas, thermal, hydro/other, nuclear power, and electricity, and production of vegetal fuels by region, country, and the world. Energy balance sheets covering production, import, export, and consumption are presented in three formats of varying detail reflecting the detail available for individual countries.
Data are collected from national administrations for OECD countries and compiled in close collaboration with other international organizations including the Asian Development Bank, the Economic Commission for Europe, Eurostat, OLADE, the Statistics Division of the United Nations, and the World Energy Conference. In addition to many direct submissions received from energy organizations and bodies, IEA consulted the extensive bibliography listed in World Energy Statistics and Balances.
Data are presented in the IEA "Basic Energy Statistics" format: tonnes for coal, crude oil, condensates, and oil products; terajoules for gases; and, gigawatt hours for electricity. In addition, data are converted to a common energy unit (million tonne of oil equivalent), which allows for easy comparison of the contributions each fuel makes to the economy and their interrelationships through the conversion of one fuel to another. All of this is essential for estimating total energy supply, forecasting, energy conservation, and analyzing the potential for interfuel substitution.
The approach used to present heterogeneous data in a common unit and balance format produces results which may appear unsatisfactory with respect to certain countries or sectors. While implementing the standard approach rigorously in most cases, OECD occasionally modifies the methodology to deal with some special aspect of a country's energy supply/demand balance. Notes explaining these modifications accompany the tables.
Regional and country-level energy balance sheets calculate total primary energy supply based on indigenous production, imports and exports, international marine bunker, and stock changes. Energy use by petroleum refineries and electricity generating plants and in other transformations is subtracted from energy supply to yield energy available for consumption. Energy consumption data are provided for total industry (with detail for iron and steel, chemical, and non-metallic minerals industries), total transportation (with detail for road and air transportation), and total other (with detail for agriculture, public/commerce, residential, and non-energy use). Electric energy generation is also estimated on balance sheets.
Statistics cover: (1) OECD participating countries: Australia, Austria, Belgium, Canada, the Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Japan, Luxembourg, Mexico, the Netherlands, New Zealand, Norway, Portugal, Spain, Sweden, Switzerland, Turkey, the United Kingdom, and the United States; and, (2) Non-OECD member countries (grouped in several regions): Africa, Latin America, Asia, China, Non-OECD Europe, the Former U.S.S.R., the and Middle East.
The International Energy Agency (IEA) is an autonomous body which was established in 1974 within the framework of the OECD to implement an international energy program. The basic aims of IEA are: (1) co-operation among IEA participating countries to reduce excessive dependence on oil through energy conservation, development of alternative energy sources, and energy research and development; (2) an information system on the international oil market as well as consultation with oil companies; (3) co-operation with oil producing and other oil consuming countries with a view of developing a stable international energy trade as well as the rational management and use of world energy resources in the interest of all countries; and, (4) a plan to prepare Participating Countries against the risk of a major disruption of oil supplies and to share available oil in the event of an emergency. IEA carries out a comprehensive program of energy co-operation among 23 of OECD's 27 member countries. It provides energy production, consumption, and trade data for more than 100 countries, including OECD member countries, non-OECD countries, and CPEs (countries with centrally planned economies).
The data is only aggregated if at least 75 % of the observations are available (i.e. % of population or % of area or % of countries) on an annual basis.
The value "-9999" corresponds to "No Data".
Calculated pre 1991-1992 relative country share
Former Yugoslavia SFR:
Pre-1991 relative shares of the 15 republics of the former USSR calculated based on data available
Pre-1991 relative shares of the 6 republics of the former Yugoslav SFR calculated based on data
available after 1991.
The calculated values relate to regional/subregional and global aggregations only.
Gross electricity production is measured at the terminals of all alternator sets in a station; it
therefore includes the energy taken by station auxiliaries and losses in transformers that are
considered integral parts of the station.
The difference between gross and net production is generally calculated as 7 percent for conventional
thermal stations, 1 percent for hydro stations, and 6 percent for nuclear, geothermal and solar
stations. Hydro stations' production includes production from pumped storage plants.
A Gigawatt-Hour is defined as 85.98 TOE (Tons of Oil Equivalents) or 3.6 TJ (Terajoules).
Copyright c 2002 (Aggregations) United Nations Environment Programme/DEWA/GRID-Geneva.
Data aggregation made by Andrea DeBono and Ola Nordbeck (UNEP/DEWA/GRID-Geneva).