The two graphs show the main sources of energy in the USA in the 1980s and the 1990s.

The following pie graphs compare five different commonplace source consumptions in the USA from 1980 to 1990. Looking from an

overall

perspective, it is readily apparent that Oil was the main usage in ten years, followed by Natural gas and Coal was showed broadly similar trends in a given period,

while

the unrenewable sources with the lowest numbers were Hydroelectric

Power

and Nuclear

Power

. In 1980, Oil accounted for slightly under half at 42%, which was the biggest number in the data, and

this

figure decreased by 9% in the

last

year. Natural gas was at 26, less than the first one, and it declined by 1% in the final year surveyed.

On the other hand

, Coal, which was the third in the graph, comprised almost a quarter of the chart in 1980

,

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and went up by 5% in 1990.

Furthermore

, in terms of Hydroelectric

Power

and Nuclear

Power

, both were similar percentages which were 5% in the first year,

however

, Nuclear

Power

's number rose from 5 to 10% in 1990.