The pie charts illustrate changes in the proportion of energy produced from different resources in a country in 1985 and 2003.
Overall, oil remained the dominant source of energy in both years, although its share decreased significantly. In contrast, natural gas and coal became more important over the period, while nuclear energy and hydro experienced slight changes.
In 1985, oil accounted for the largest proportion of energy production at 52%. Nuclear energy was the second biggest source, making up 22%. Natural gas contributed 13%, whereas coal represented only 8%. Hydro power and other renewable sources were the least significant, at 4% and 1% respectively.
By 2003, the proportion of oil had fallen considerably to 39%. However, natural gas and coal saw noticeable increases, rising to 23% and 22% respectively. Nuclear energy, on the other hand, declined sharply to 8%. Hydro power remained stable at 4%, while other renewable sources increased moderately to 4%.
In conclusion, while oil continued to dominate energy production, there was a clear shift towards natural gas and coal between 1985 and 2003.