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

The graph illustrates data about how much of the main fuels were produced, over a nineteen-year period between 1981 and 2000. In general, what stands out from the graph is that there were remarkable upward trends in both petroleum and natural gas,

while

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the

production

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of coal fell dramatically. Another interesting point is that the highest

production

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was for petroleum in the period mentioned. Looking at the details, as regards petroleum,

production

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started at around 90

units

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in 1981,

then

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it rose sharply to 140

units

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over the next three years, at which point it

leveled

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levelled

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off until 1987.

Then

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the figure went down significantly by the end of 1990, but it rose gradually, finishing at around 140

units

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in 2000.

In addition

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, coal making started at 80

units

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and remained the same for 2 years but still, it plummeted to under 40

units

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in 1985. Despite experiencing a sharp rise to around 60

units

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, it fell gradually to around 30

units

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in 2000.

On the other hand

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, the

production

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of natural gas started at just under 40

units

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but didn't see any noticeable change for around a decade. The graph

then

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began to rise moderately, which it finished at 100

units

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.