The two pie charts illustrate how different energy sources were produced in a country, percentage-wise, from 1985 to 2003.
Overall, at the beginning of the period, the other renewable energy source produced the least in the country, while oil was the most significant energy segment. In comparison, at the end of the period, oil was still the largest energy-producing segment, and the smallest portions were made by hydrogen and other renewable energy sources.
The natural gas sector accounted for 13% of the energy produced in the country in 1985 and increased to 23% in 2003. Energy produced from the coal sector was 8% in 1985 and had a growth of 5% to reach 13% in 2003. At the beginning of the period, other renewable energy made up the lowest percentage, at only 1%, and this figure rose slightly to 4% in 2003.
On the other hand, oil, which comprised almost half of the total energy in the country in 1985, fell to 39% in 2003. In 1985, energy produced from the nuclear sector was at 22% and decreased by 5% after an 18-year period. In contrast, energy produced from the hydrogen segment remained constant in both years at 4%.