The linegraph illustrates changes in the production levels of petroleum, coal, and natural gas in the UK from 1981 to 2000.
In general, there was an upward trend in the amounts of petrolium and natural gas production, while coal saw a moderate decrease over the same period.
In 1981, petrolium dominated other kinds of fuel, accounting for approximately 100 tonnes. It increased sharply to 130 tonnes over the next two years, remained consistent for four years, and then decreased significantly to stand at the lowest point of over 90 tonnes in 1991. However, petrolium reverted to achieve a considerable growth of about 30 tonnes to 120 tonnes at the end of the period.
Roughly 20 tonnes less than that of petrolium in 1981, the production of coal stayed unchanged for 3 years, before suffering a severe decline to under 50 tonnes in 1985. Despite a surge of 20 tonnes in 1987, coal experienced a gradual decrease from 50 to under 40 tonnes in 2000.
Natural gas, the fuel that contributed to the smallest market share, was recorded at 40 tonnes in 1981, and then remaining stable over the next decade. Nevertheless, much like petrolium, coal saw a steep rise in thee production to peak more than 80 tonnes by the end of the frametime.