Data regarding the sources used to generate electricity in Germany between 1980 and 2010 are illustrated by the given two pie charts.
In brief, electricity production more than doubled over the period, mainly by a dramatic rise in nuclear power while the amount of hydro and natural gas power decreased, coal remained unchanged.
To begin with, in 1980, coal and natural gas were the largest contributors, each producing 28 units. This was followed by petroleum, at 22 units, which was 2 units more than nuclear energy. The contribution of hydro was the smallest share, at only 7 units.
By 2010, noticeable changes had occurred. The production level of energy generated using nuclear increased dramatically to 155 units, similarly, this figure for petroleum also saw a slight climb to 27 units. In contrast, the shares of natural gas and hydro witnessed a small drop. Both sources fell equally to 2 units, while coal remained unchanged.