For the years 1971 to 1989 the data sources are
World Bank
and
IEA (imports/exports).
For the years 1990 to 2019 the data source is
IEA.
For the years 2020 to 2023 the data source is
Ember.
For the year 2023/2024 the data source is
aggregated data from the last 12 months (2023-09 to 2024-08).
For the months 2023-09 to 2024-08 the data source is
ENTSOE.