The provided pie charts illustrate the proportions of energy derived from various sources in a specific country during the years 1985 and 2003.
A notable shift in energy production is observed over the time period, with a significant decrease in oil and nuclear energy, contrasted by increases in natural gas and renewable resources.
In 1985, oil was the predominant energy source, contributing 52% of total production. Nuclear energy followed at 22%, while natural gas, coal, hydrogen, and other renewable resources represented 13%, 8%, 4%, and 1%, respectively. By 2003, the landscape transformed considerably; oil usage plummeted to 39%, and nuclear energy further declined to 17%. Conversely, natural gas surged to 23%, marking an increase of 10%. Coal also saw growth, rising from 8% to 13%, highlighting a notable shift in the energy mix.
The most consistent change noted was in the category of renewable sources, where the share doubled from 1% to 4% between 1985 and 2003. Hydrogen maintained a consistent representation of 4% throughout this period, indicating a stable reliance on this resource. The overall data reflects a gradual transition towards a more diversified energy portfolio, although oil and nuclear energy remained significant contributors despite their downward trends.