The pie charts illustrate alterations in the percentages of energy produced from various sources in a particular country in two distinct years: 1985 and 2003.
Overall, it can be seen that despite the decrease in the oil source, it remained the highest one among others. Notably, most sources increased over the timeframe.
In 1985, oil accounted for 52%, which was the highest one that year, whereas other renewable resources accounted for the least, reaching only 1%. In addition, nuclear and natural gas resources had average percentages, making up 22% and 13% respectively. By contrast, coal and hydro accounted for 8% and 4%, being relatively low ones.
By 2003, substantial changes had taken place. The highest type of resource along with nuclear power decreased from 52% and 22% to 32% and 8%, whilst natural gas and coal recorded an upward trajectory, reaching 23% and 22% respectively. Additionally, other renewable energy grew slightly to 4%, which was the same as hydro that remained unchanged by the end of the period.
