The given pie chart depicts the percentage of energy generated from various sources in a particular country from 1985 to 2003.
Overall after 18 years, oil was still the dominant source for energy production despite a significant decrease in its proportion. however, this country started increasing the production of energy from natural gas, coal, and renewable sources.
It is clear from the pie chart that oil was the major source of energy production throughout the whole period, although its usage dropped from just over a half (52%) in 1985 to approximately two-fifth (39%) in 2003. The use of nuclear also declined from 22% to 17% over the given period.
The use of natural gas and coal showed an increase from (13%) and (8%) in 1985 to (23%) and (13%) respectively in 2003 and that of other renewable resources increased from 1% to 4% over the given period of 18 years. Interestingly the proportion of energy produced from hydrogen remained stable at 4%.