The pie charts illustrate the percentage of energy produced from different resources including such as nuclear, oil, natural gas, coal, hydro, and other renewables in 1985 and 2003.
Overall, oil constituted the most noticeable proportion of energy produced in both years, although its percentage decreased over time. Additionally, the figures for natural gas, coal, and other renewable experienced an upward trend while the reverse pattern could be seen in the data for oil and nuclear. Moreover, the percentage of hydropower remained stable during the course.
Concerning the categories that rose, the amount of natural gas in 1985 was 13%, which was increased slightly to 23% after eighteen years. Noticeably, the coal witnessed a dramatic increase from 8% to 22%, overtaking its counterparts and becoming one of the three main energy sources produced. In contrast, other renewables only rose gradually from 1% to 4%, which was still the lowest of the energy sources.
Conversely, data demonstrated that oil accounted for most of the energy production at 52% in 1985. However, by 2003, it dropped significantly by 13% to 39% still held the top energy produced. In addition, nuclear decreased from 22% to 8%, falling from the second largest to one of the minor enegry. Finally, hydropower remained constant at 4% throughout the period.