For the years 1990 to 1991 the data source is
IEA.
For the year 1992 the data sources are
EIA
and
IEA (imports/exports).
For the years 1993 to 2007 the data source is
IEA.
For the year 2008 the data source is
Ember.
For the years 2009 to 2013 the data source is
IEA.
For the years 2014 to 2016 the data source is
Ember.
For the year 2017 the data source is
IEA.
For the years 2018 to 2019 the data sources are
IEA
and
IEA (imports/exports).
For the years 2020 to 2022 the data source is
Ember.
For the year 2023 the data source is
ENTSOE.