The pie present data on the variation of energy production across 6 different resources in a country in 1985 and 2003.
As can be seen from the chart, citizens of the country were much more environment conscious over the years. While energy production using eco-unfriendly resources (except for coal) underwent significant fall, its green counterparts correspondingly witnessed an increase.
In 1985, oil was the main source of energy, making up approximately half of the total production, followed by 22% of nuclear power. Coal was also used at this time, but was less favored than natural gas, which comprised 13%. Notably, renewable energy gained little attention in this period (a mere 5% in total).
Turning to 2003, the two largest contributors of energy production showed a considerable decrease. Although oil remained as the most important, its figure dropped by 13% after 18 years. Interestingly, coal and nuclear exchanged their data, showing a preference toward coal. In addition, with an increase by 10%, natural gas had surpassed others and become the second most-used resource. Even though the figure for hydro was still the same, that of other renewable resources witnessed a slight increase of 3%.