The graph illustrates the of main fuels producing in a European country from 1981 to 2000. As is shown in the graph, the amounts of petroleum and coal had had an impressively fluctuation during the period time and had a downward trend at the end of the timeframe, while the amount of natural gas just had little changes compared with other fuels.
In 1981, just under 100 tonnes of petroleum were produced in European contry before increasing to a peak of 130 tonnes in 1983 and remained stable during the next four years. Then plunging back to the starting level in 1989 and had a slight decrease in 1990, 1991. Remarkably, there was a massive leap in the amount of petroleum that increased significantly from approximately 90 tonnes in 1991 to a peak of just over 130 tonnes in 1996; however, there was a small decrease in 1997, which was negilible. It was surged back to the previous peak in 1998 and had a downward trend in the last two years.
The amount of coal which was produced in European was exactly 80 tonnes in 1981, remaing stable during the first three years before plunging significantly from 80 tonnes to 50 tonnes in 1995 and increased rapidly at just over 70 tonnes in 1987. Then it slipped considerably to the end of the period at just under 40 tonnes in 2000.
Compared with other fuels, natural gas remained steady at 40 tonnes over the period of ten years before increasing slightly to just under 50 tonnes in 1997 and had a upward trend in 1997 to the end of the period.