The two pie charts illustrate how the proportion of energy produced from various sources in a country changed between 1985 and 2003.
Overall, what stands out from the diagram is that oil’s share decreased over time, while coal and renewable energy sources gained more importance between 1985 and 2003.
In 1985, oil was the dominant energy source, contributing 52% of the total energy. Natural gas was the second-largest at 22%, followed by coal at 13%. Nuclear power accounted for 8%, while hydroelectric power made up 4%. Other renewable sources played a minor role, providing just 1% of the energy.
By 2003, there was a sharp decrease in oil’s share, which dropped to 39%, while natural gas increased slightly to 23%. Coal also saw an increase, rising to 22%. Nuclear energy remained stable at 8%, and hydroelectric power still made up 4%. However, the contribution of other renewable sources grew to 4%, up from just 1% in 1985.