The pie charts illustrate the proportions of energy from five sources—coal, gas, petroleum, nuclear, and others—during the years 1995 and 2005. Overall, energy production from all sources increased rapidly, with the exception of petroleum, which declined by almost ten percent. Additionally, coal, gas, and petroleum were the largest contributors to energy production.
Considering the details, coal initially had the highest share of energy production, which showed a minimal increase from 29.80% to 30.93% over the ten-year period. Gas followed a similar pattern, starting at 29.63% and growing slightly to 30.31%. In contrast, the trend for petroleum was notably different, as it began with a relatively high share of 29.27% in 1995 before experiencing a dramatic decline to just 19.10% in 2005.
On the other hand, both nuclear and other sources had the lowest levels of energy production. In 1995, nuclear energy accounted for only 6.40% of production, but by 2005, it increased to 10.10%. Furthermore, the category of ‘other’ contributed the least of the five sources, starting at 4.90% and rising to 9.10% by 2005.