Depicted in the pie charts are the remarkable shifts in the percentage of energy generated from six distinct resources, namely oil, natural gas, coal, nuclear, hydro, and other renewable sources, in a country between 1985 and 2003.
Overall, it is evident that there was an upward pattern exhibited in the majority of energy generated from resources, except for nuclear power, oil energy, and hydro power. Despite the reduction in the ratio of energy produced from oil in 2003, this figure retained its dominant position over the period.
Comprising 52% of the total energy generated in 1985, the percentage of oil was the highest figure among the six distinct energy sources. This figure witnessed a drop of 13% over the following 18 years. Similarly, the nuclear energy dropped significantly from 22% to 8% in 2003. Meanwhile, the hydro power remained unchanged at 4% over the time span, making it the only category experiencing an unchanged pattern.
In contrast, there was an upward trend in the rate of power generated from natural gas, coal, and other renewable sources. Specifically, the power made from natural gas made up 23% in 2003, nearly double that in 1985. A similar pattern can be witnessed in the figure for energy produced from coal, which exhibited an increase of 14% in 2003. Meanwhile, the proportion of power generated from other renewable sources in 2003 was 4%, four times higher than that in 1985.