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

the

production

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

production

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

production

started at around 90

units

in 1981,

then

it rose sharply to 140

units

over the next three years, at which point it

leveled

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levelled

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off until 1987.

Then

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

units

in 2000.

In addition

, coal making started at 80

units

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

units

in 1985. Despite experiencing a sharp rise to around 60

units

, it fell gradually to around 30

units

in 2000.

On the other hand

, the

production

of natural gas started at just under 40

units

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

then

began to rise moderately, which it finished at 100

units

.