The pie charts compare the proportions of energy sources in a country for the years 1995 and 2005. Overall, the percentage of energy produced from petroleum decreased over this period, while other types of energy sources saw an increase.
In 1995, gas, coal, and petroleum were the primary sources of energy production, each contributing approximately 29% of the total energy. In contrast, nuclear power and other sources were the least utilized, making up only 6.4% and 4.9%, respectively.
By 2005, significant changes had occurred. Coal and gas experienced a slight increase of about 1% each, but their dominance in energy production remained unchanged. Conversely, petroleum saw a substantial decrease of around 10%, accounting for 19.55% of the total. Notably, nuclear power and other sources also increased, reaching 10.10% and 9.10%, respectively.