For the years 1990 to 1997 the data source is
IEA.
For the years 1998 to 1999 the data sources are
EIA
and
IEA (imports/exports).
For the years 2000 to 2006 the data source is
Ember.
For the years 2007 to 2009 the data source is
IEA.
For the year 2010 the data source is
Ember.
For the years 2011 to 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.