The line graph portrays the amount of 3 primary fuels manufactured in a European nation over the course of 19 years.
In general, while it is apparent that most fuels witnessed an upward trend in production levels over the period, coal bucked the trend, becoming the least common combustion resource in the final year. Notably, petroleum, despite undergoing some oscillations, still managed to retain its predominant position as the most-produced fuel throughout the timeline.
Petrol levels stood high at the beginning of the period, experiencing a steady rise from below 100 tonnes to just around 130 tonnes in 1983 before plateauing within the next 4 consecutive years. The figure then suffered from a significant dip prior to a steady resurgence to approximately 120 tonnes in 2000. In a similar trend, natural gas started as the least extracted and processed fuel, resigning at 40 tonnes, after which the figure increased gradually to about 50 tonnes in 1997 before ending the year with a sharp leap of around 1.5 folds to over 80 tonnes.
Meanwhile, the amount of coal manufactured went down consistently from 80 tonnes to under 40 tonnes throughout the period, making it the least manufactured fuel.