The pie chart illustrates the distribution of energy manufactured from different resources in a particular nation from 1985 to 2003.
Overall, oil and nuclear production exhibited a significant decrease in the percentage, while a reverse trend was seen in that of natural gas, coal and other renewable sources, except for hydrogen, whose figures remained unchanged. Another striking feature is that energy produced from fuel recorded the dominant proportion in both years.
Regarding the three primary energy sources, it is evident that oil stood out as the most manufactured source in both years, with more than half in 1985 and 39% in 2003, despite experiencing a steep decline during the given period. A similar trend was seen in the share of nuclear energy production, which initially emerged as the second place at 22% but later fell substantially to 17% by 2003. Meanwhile, the percentage of natural gas reached 23% in 2003, marking an enormous rise of 5% compared to its initial level and exceeding that of nuclear energy to secure the second position.
In terms of the remaining sources, coal production accounted for 8% in the total of energy production in 1985, whose figure later grew steeply to 13% by 2003. Other renewable sources saw a similar pattern but to a less pronounced extent, which made up a minor proportion in the first year and about 4% in the final year. Energy produced from hydrogen sources, in the meantime, stayed unaltered at just 4% during the given period.