The pie charts illustrate the percentage of energy generated from five different sources, namely Hydropower, Oil, Nuclear power, Coal, Natural gas, in a particular nation between 1983 and 2003.

The given pie charts illustrate how the percentage of power manufactured in a nation changed over a period of 20 years between 1983 and 2003. Looking at the charts from an

overall

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perspective, the manufacture of hydropower indicated a plateau during the term,

while

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other sorts of energy except oil and coal witnessed an upward tendency. What is more, the proportion of oil always outweighed the others. In detail, the production of hydropower demonstrated a steadiness at 4% throughout the time. In 1983, the ratio of oil accounted for 42% of the energy produced,

however

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,

this

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figure moved downward slightly by 4% in 2003. The manufacture of coal experienced the same trend, it took a nose dive to 13% in 2003 compared to 23% in 1983. Nuclear power manufacture showed an insignificant leap from 20%

in

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at

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the beginning to 24%

at the end

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of the period.

Similarly

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, the production of natural gas occupied 11% of the pie in 1983,

nevertheless

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, the proportion in 2003 illustrated a 2-fold rise to 21%.