The line graph represents the production of fuel to 200 European countries during the period between 1981 and 2000.
Overall, it is clear that the production level of natural gas has seen a significant rise during the given period. Moreover, petroleum experienced more fluctuations from the year 1981. It is notable that the figure for coal became the least in the end, which was the highest at the beginning.
Firstly, the extraction level for petroleum was nearly 100 million tonnes in 1981. This figure then increased drastically to approximately 130 million tonnes, before seeing a big dip for two years, from 1989 to 1992. A dramatic growth in the figure for natural gas processing can be noticed post-1985. In the beginning, for some years, it remained constant at 48 million tonnes. Furthermore, the stability of coal production remained at 80 million tonnes until 1984, when a huge drop occurred. After that, production levels remained low, with a slight decrease in coal production still happening.