The pie charts illustrate the shifts in the percentage of energy generated from five distinct sources in a specific country between 1983 and 2003.
Overall, oil remained the dominant energy source, despite a slight decrease in its share. Conversely, natural gas and nuclear power became increasingly important, while coal production fell significantly. Hydropower remained the least significant contributor, maintaining a stable proportion throughout the two decades.
In 1983, oil accounted for the largest share of energy production at 42%, followed by coal at 23% and nuclear power at 20%. Natural gas and hydropower contributed 11% and 4% respectively. By 2003, oil production had decreased to 38%, yet it still held the largest share. The most dramatic change occurred in natural gas, which nearly doubled its contribution from 11% to 21%. Similarly, nuclear power increased its share from 20% to 24%.
In contrast, coal production saw a sharp decline, dropping from 23% in 1983 to 13% in 2003. Meanwhile, the proportion of energy derived from hydropower remained unchanged at 4% over the twenty-year period, continuing to be the smallest source of energy production.