This dataset contains information about coal total proved reserves from 2004. Data from BP.Follow datasource.kapsarc.org for timely data to advance energy economics research.Please note that due to process improvements for the Statistical Review these reserves tables have not been updated this year.Source: statistics are taken from national statistical agencies, international organizations, and other proprietary sources. Includes data from Federal Institute for Geosciences and Natural Resources (BGR) Energy Study 2021. * More than 500 years.♦ Less than 0.05%.Notes: Total proved reserves of coal- Generally taken to be those quantities that geological and engineering information indicates with reasonable certainty can be recovered in the future from known reservoirs under existing economic and operating conditions. The data series for total proved coal reserves does not necessarily meet the definitions, guidelines and practices used for determining proved reserves at company level, for instance as published by the US Securities and Exchange Commission, nor does it necessarily represent BP’s view of proved reserves by country. Reserves-to-production (R/P) ratio - If the reserves remaining at the end of any year are divided by the production in that year, the result is the length of timethat those remaining reserves would last if production were to continue at that rate.Reserves-to-production (R/P) ratios are calculated excluding other solid fuels in reserves and production.Shares of total and R/P ratios are calculated using million tonnes figures.