The pie charts above show the comparison of the proportion of energy produced by different sources in an European country in 1995 and 2005

The graph reveals changes in the variety of energy production in a particular European country over the course of 10 years from 1995 to 2005. It can be seen that the figure for all categories witnessed an upward trend while that for Petro experienced the opposite pattern.

Regarding the energy generated from Coal which its figure always possessed the highest value, increasing by 1.13% from 29.80% in the first year to 30.93% in the last year. Similarly, the rate of energy produced from Gas comprised of 29.63% in 1995 then accounting for 30.31% 10 years afterward. This was followed by the category of “other” and “nuclear”, which their proportion was the lowest, rising steadily from 4.90% and 6.40% in the first year to 9.10% and 10.1% in the last year respectively. By contrast, the figure for Petro shown a significant decline. To be exact, this proportion decreased by 9.72% to 29.55% during a 10-year-period