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

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

Overall

, it is evident that petroleum

production

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

production

witnessed a significant decline,

while

the

production

of natural gas experienced substantial growth over the period. Petroleum

production

rose from 90

million

tonnes

in 1981 to 140

million

tonnes

in 1987 and remained at

this

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

million

tonnes

, but

production

then

climbed again, reaching approximately 140

million

tonnes

by 2000.

In contrast

, coal

production

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

million

tonnes

. Despite a brief rebound to 60

million

tonnes

in 1985, the

production

level decreased steadily, finishing at around 35

million

tonnes

by 2000. Meanwhile, the

production

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

production

after 1991, and continued to rise, reaching 100

million

tonnes

in 2000.