The line chart illustrates how much primary fuels were produced in a nation in Europe between 1981 and 2000.
Overall, while the numbers of petroleum and natural gas that were produced witnessed a considerable rise, a sharp decrease was seen in the figure for coal. Another noteworthy feature is that despite some fluctuations, the production level of petroleum remained the highest throughout the period.
Looking first at levels of production of fuels witnessing an increase, just under 100 tonnes of petroleum was produced in 1981, followed by a considerable growth to peak at 130 tonnes in 1983. This number had remained unchanged until 1987, before decreasing sharply to about 95 tonnes in the next 4 years. However, the production level of this fuel witnessed a significant rise to about 130 tonnes again, before ending the period at shy of 120 tonnes. The production level of natural gas was 40 tonnes in 1981, after which it hovered around this mark until 1995, before growing significantly to reach a peak of 80 tonnes in the next 5 years.
As for the other production level of fuel, the number of coal that was produced in 1981 was equal to that of natural gas in 2000 (80 tonnes), which was followed by a significant decrease in the next four years. Although there was a slight increase in this figure after 3 years, the amount of coal produced was fallen dramatically to reach a low of just under 40 tonnes until the end of the period. It is important to note that the level of production of coal , in 1997, was surpassed by that of natural gas.