For the years 1971 to 1989 the data source is
World Bank.
For the years 1990 to 1995 the data source is
IEA.
For the years 1997 to 2013 the data source is
IEA.
For the years 2014 to 2023 the data source is
Ember.
For the year 2023/2024 the data source is
aggregated data from the last 12 months (2023-11 to 2024-10).
For the months 2023-11 to 2024-10 the data source is
Ember.