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 line graph illustrates three main kinds of fuel

petroleum

, coal and natural gas in the United Kingdom over the

period

of 19 years from 1981 to 2000.

Overall

, both the proportion of

petroleum

and natural gas witnessed upward trends

while

the figure for coal experienced a contrasting movement over the given

period

. The amount of energy produced by

petroleum

started at 95

million

tonnes

of oil,

then

decreased noticeably which was followed by a sharp rise to 140

million

in 1996. To the

last

of the

period

in 2000, the production levels of

petroleum

climbed slightly and peaked at 142

million

tonnes

- one of the biggest levels in 3 kinds of fuels.

In addition

, the proportion of natural gas increased minimally and remained unchanged at around 39 to 40

million

tonnes

. In the next 5 years,

this

data

also

witnessed a dramatic growth of 43

million

tonnes

but later rose slightly by 101

million

tonnes

in 2000.

Finally

, the date of coal

also

started at 80

million

tonnes

,

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but later dropped remarkably and hit a bottom at 38

million

tonnes

. From 1986 to 1991,

this

figure for coal

maintained

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was maintained

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at around 60

million

, which led to

fluctuate

Replace the word

fluctuation

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at around 60

million

in

next

Correct article usage

the next

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5 years and declined slightly by 2

million

tonnes

at the end

of the

period

.