The supplied pie chart illustrates the proportion of various types of electricity generation in New Zealand and Germany for the years 1980 and 2010. The data is measured in percentages.
From an overall perspective, it is clear that hydro and nuclear power were the most significant sources of energy, accounting for over half of the overall energy production. In contrast, coal, petroleum, natural gas, and other energy sources generated considerably less energy in both New Zealand and Germany.
Looking at the details, hydro energy comprised 30% of the total energy production in New Zealand in 1980, showing only a slight increase to 46% in 2010. Similarly, in Germany, natural gas was the main source of energy production in 1980 at 28%, but by 2010, nuclear power had become the dominant energy source, dramatically increasing to 15%.
Regarding the remaining methods of energy production, petroleum accounted for approximately 5% in 1980 in New Zealand, while natural gas and petroleum together accounted for only 2% in 2010. However, the energy sources in Germany differed in these years, with hydro contributing 7% and natural gas providing a lesser percentage.