The pie charts show the proportions of energy produced from five sources in a particular country in 1995 and 2005. Overall, coal, gas, and petrol dominated energy production in 1995, contributing similar shares. By 2005, the shares of coal, gas, nuclear energy, and other sources increased, whereas petrol's contribution decreased significantly.

Looking first at predominant energy sources—coal, gas, and petrol—these each accounted for approximately 29% of energy production in 1995. By 2005, coal and gas saw slight increases to just over 30% each, while petrol's share dropped by one-third to just under 20%.

Nuclear power and other energy sources contributed much smaller shares in 1995 but experienced noticeable increases over the period. Nuclear energy rose from just over 6% to slightly above 10%, while other sources grew from 5% to 9%.

In summary, the country primarily relied on gas, coal, and petrol for energy production in 1995. While coal and gas remained significant contributors a decade later, petrol's importance declined. Although nuclear power and other sources became slightly more prominent, they remained less significant overall.