The graph below shows the production of levels of the main kinds of fuel in the UK between 1981 and 2000. Summarize the information by selecting and reporting the main features and make comparisons where relevant.

The line graph gives information about the

production

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levels

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of the main fuels in the United Kingdom, over a 19-year period from 1981 and 2000.

Overall

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, what stands out from the chart is that the

production

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levels

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of petroleum and natural gas increased significantly,

while

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production

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levels

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of coal experienced a gradual decline. In 1981, the

production

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level of petroleum started at about 95 energy units, which was followed by a steady increase to 140 in 1985.

However

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, having declined steeply to 100 in 1991, the

production

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levels

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of petroleum grew gradually to 140 in 2000. As for natural gas, during the decade between 1981 and 1991, the level of natural gas was the same, with around 40 energy units. After that,

this

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figure rose markedly to 100 in the final year. When it comes to the

production

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level of coal,

initially

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it was 80, after which

,

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the figure halved in 1985. But

then

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, it witnessed a small growth to 60 in 1996, which was followed by a considerable decrease to approximately 40 energy units in 2000.