For the years 1980 to 1984 the data sources are
EIA
and
IEA (imports/exports).
For the year 1990 the data source is
IEA.
For the years 1992 to 1993 the data source is
IEA.
For the years 1995 to 2005 the data source is
IEA.
For the years 2009 to 2018 the data source is
IEA.
For the years 2019 to 2023 the data source is
Ember.
For the year 2023/2024 the data source is
aggregated data from the last 12 months (2023-07 to 2024-06).
For the months 2023-07 to 2024-06 the data source is
Ember.