The pie charts indicate changes in the proportions of energy produced in a country from 1983 to 2003. Summarize the information by selecting and reporting the main features, and make comparisons where relevant.

The pie graphs illustrate how the percentages of

power

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manufactured in a country shift between 1983 and 2003.

Overall

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, there was a considerable increase in the proportions of nuclear

power

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and natural gas produced,

while

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those of hydropower levelled off and remained the lowest ones throughout the period.

By contrast

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, the figures for

oil

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and coal experienced a decline, but those for

oil

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consistently were the biggest parts. In 1983, exactly 42% of the total energy came from

oil

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, after which it saw a moderate tumble to 38% in 2003. A similar change can be found in the data for

oil

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, which started at 23% and almost halved in the final year of the stage examined.

Conversely

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, nuclear

power

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contributed 20% to

power

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production at the beginning of the period,

then

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it rose to reach 24% in 2003. The share of natural gas witnessed a resembling growth, doubling to 21% after 20 years. The opposite trend was seen in those for hydropower, which steadily kept at 4% over two decades.