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

The given pie charts display the percentage of five kinds of energy produced in America between 1983 and 2003.

Overall

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, oil made up the biggest part of the total share in both years 1983 and 2003, but the proportion of oil saw a slight decrease in 2003.

Similarly

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, producing coal witnessed a significant drop from 1983 to 2003,

in contrast

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with natural gas and nuclear power production which observed a rise over the 20-year period. As can be seen from the pie charts, oil production in America accounted for nearly

a

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half of the total in 1983, but there was a slight drop of 5% in 2003. Producing coal made up over a fifth of the total;

however

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, the proportion fell significantly to 13% over the next 20 years.

On the contrary

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, natural gas manufacture saw a substantial increase. It had only about a tenth of the total in 1983, but the figure rose to over a fifth in 2003.

Similarly

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, nuclear power production

also

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saw an upward trend of 4% in 2003. Hydropower was the only kind of energy which remained stable in both years, at 4%.