The pie chart talking about the energy produced in France at the year 1995 and 2005. It state that their energy income are from coal, nuclear, petro, gas and other things.
In 1995, the most energy produced are from coal, followed by gas, then petro, while the rest are from nuclear and other. By data gas, coal, and petro are almost equal, producing more than 29% each for the year of 1995.
On present year, in 2005. the two most produced energy are made from coal and gas. petro are significantly going less producing almost 10%. While nuclear and other are also rising for proximately almost 5% each.
By the cart, we can see that the energy produced in a decade have the same source but different production. Keeping the same source, but different input.