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

The line graph compares the

production

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levels of three primary fuel types in the UK between 1981 and 2000.

Overall

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, it is evident that petroleum

production

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consistently maintained the highest number of energy units over the two decades despite some fluctuations. Coal

production

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witnessed a significant decline,

while

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the

production

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of natural gas experienced substantial growth over the period. Petroleum

production

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rose from 90

million

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tonnes

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in 1981 to 140

million

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tonnes

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in 1987 and remained at

this

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level until 1990. The following three years saw a temporary drop to 100

million

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tonnes

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, but

production

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then

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climbed again, reaching approximately 140

million

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tonnes

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by 2000.

In contrast

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, coal

production

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declined over the 20 years, with a sharp drop in 1983. The figure bottomed out in 1984 at 39

million

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tonnes

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. Despite a brief rebound to 60

million

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tonnes

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in 1985, the

production

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level decreased steadily, finishing at around 35

million

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tonnes

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by 2000. Meanwhile, the

production

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of natural gas increased steadily throughout the period. It surpassed coal

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after 1991, and continued to rise, reaching 100

million

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tonnes

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in 2000.