The graph illustrates the production level of petroleum, coal and natural gas in the UK from 1981 to 2000.
Overall, the biggest production level was reached by petroleum in that period of time, however, natural gas also had a steady increase in production. On the other hand, coal production showed a down trend.
In 1981, the production of natural gas was below 40 million tonnes. It experienced an up-trend to 100 million tonnes of oil in 2000, becoming the second most used oil in the UK. Although, production level of petroleum was 90 million tonnes in 1981, then it increased to 140 million tonnes and remained unchanged from 1984 to 1987. The level of production decreased to the lowest point of 100 million tonnes, after achieving the same energy units as in 1984.
The rate of production of coal in the UK, in 1981 was 80 million tonnes, but it declined to below 40 million tonnes, before showing a plateau from 1981 to 1983. The line level slowly decreased from 60 to 30 million tonnes, from 1986 to 2000, respectively. Thus, coal production level won the third place in the graph.
