For the years 1990 to 2004 the data source is
IEA.
For the years 2005 to 2008 the data source is
Ember.
For the year 2009 the data source is
IEA.
For the year 2010 the data source is
Ember.
For the years 2011 to 2012 the data source is
IEA.
For the years 2013 to 2022 the data source is
Ember.
For the year 2023 the data source is
ENTSOE.