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 the production of three types of energy in

units

, coal,

petroleum

, and natural gas between 1981 to 2000.

Overall

, it can be seen from the diagram the consumption of

petroleum

was higher than the other two,

while

coal was the least consumed by the citizens and dramatic fluctuations can be experienced in natural gas,

while

petroleum

and coal declined after oscillations. It is conspicuous that, in 1981

petroleum

consumed 90

million

units

and it immediately jumped to 140

million

units

in 1984,

further

it was constant till 1987 and from that year it plunged to 100 billion

units

in 1990.

Furthermore

, it swung and augmented touched 140

million

units

in 1996,

in addition

after some movements it hit 140

million

units

in 2000. Probing ahead, coal energy was 80

million

units

in 1981, which was almost constant till 1982 and after that, it plummeted and attained 38

million

units

in 1984 after the consumption of coal

was

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increased dramatically and touched 60

million

units

in 1986,

additionally

, it was partially constant till 1989 and kept declining until reached to 35

million

units

in 2000.

In addition

, natural gas was nearly 40

million

units

in 1981 after it was unchanged till nine years in 1990,

then

it showed an increment gradually and hit 100

million

units

in 2000.