The given pie chart illustrates about proportion of electricity production by fuel source in France of the year 1990 and 2010.
Overall, nuclear power has rapidly took the huge change from 1990 to 2010. Whereas hydro power decreased from 6% to 2%. In 1990 natural gas played an important role whereas gradually it got a depleted from 28% to 5%.
Firstly, as the years flew the usage of coal, hydro power, oil and natural gas decreased day by day. Due to improvement in electricity production, nuclear power took the major role which is an increment from 17% to 67%.
In the year 1990, fuel sources (oil, coal, natural gas) had equal demand in France compared to hydro power and nuclear power. Besides, in the year 2010 people of French increased the usage of the nuclear power supply rather than the other electricity modes which lead them to stick with one resource.
