The charts below show the proportion of the energy produced from different sources in a country between 1985 and 2003.

The given pie charts present the distribution of a country's energy sources between 1985 and 2003.

While

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oil-based plants were still the largest contributor to the nation's power origin, there was a tendency for them to replace those with other fossil-based fuels: coal and natural gas.

Furthermore

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, the same trend happened on the clean energy side, where nuclear was still the largest source with a dip,

while

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the other renewable started to show an increment. In 1985, more than half (52%) of the country's energy depended on oil, followed by nuclear as the second largest proportion at almost a quarter (25%), and natural gas at 13%.

In addition

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to that, coal, hydrogen, and other renewable supported the

last

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13% at respectively 8%, 4%, and 1%. 18 years later, in 2003,

according to

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the provided information, oil was still the biggest contributor to the power industry,

however

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, the portion decreased to 39%. Interestingly, the decrement was

also

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mirrored by nuclear power at 17%. Contrary to that, natural gas moved up to the second position after recording an increment of 10% to 23% portion. Another fossil-based fuel, coal,

also

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increased by slightly to 13%. Other renewables

also

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improved the production capacity to 4%.

While

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hydrogen-based was still at the same level of 4%.