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 given line chart demonstrates three types of main fuel

production

from 1981 to 2000 in the United Kingdom. It can be seen from the graph that natural gas showed a stable increase, coal had a downward trend and petroleum fluctuated but

overall

had an upward trend. The

production

level of natural gas remained unchanged at 40

million

tonnes

for a decade and

then

it grew gradually for another decade from 1991 to 2000 and reached its highest

point

at 100

million

tonnes

.The

production

level of petroleum fluctuated from 1981 to 1990 for 9

years

, from its lowest

point

at under 100

million

tonnes

to plateau at 140

million

tonnes

and it dropped for three

years

and

then

the number started to climb steadily for the following 10

years

.Coal

production

was stable at 80

million

tonnes

for the first two

years

and

then

it plunged below 40

million

tonnes

in 1984,

however

, it rose slightly to 60

million

tonnes

from 1984 to 1986, it remained unchanged for four

years

, from

this

point

, it started to decline slowly for the following period, eventually reached its lowest

point

under 40 units. There is a cross

point

from 1990 to 1991, as is shown, natural gas and petroleum had an upward trend, meanwhile, the number for coal dropped, it can be assumed that the need for coal was replaced by the other two fuels.