The pie charts provide a breakdown of what proportion of energy was produced from six various categories in one country in two different years: 1985 and 2003.
Overall, it is clear that oil produced the highest percentage of energy, whereas other renewable resources showed the lowest proportion in energy production in both years. It is also important to note that the contribution of hydro to the energy remained unchanged over the years given.
In 1985, more than half of the energy production (52%) was from oil. The proportion of nuclear stood at 22% and was the second largest contributor in energy production. Natural gas production accounted for 13%, while coal’s share of energy production made up 8%. The use of hydro energy and other renewables in the energy mix constituted 4% and 1%, respectively.
Oil continued to be the dominant sector, although its contribution to the total energy output saw a significant drop to 39% in 2003. The production of energy from natural gas (23%) and coal (22%) sharply increased and became more prominent energy sources over the 18-year period. Nuclear energy showed an opposite trend, decreasing considerably to 8%. Hydro energy and other renewables shared similar figures (4%) and remained the least used sector in the energy mix.