the pie charts illustrate the proportion of electricity production by five different fuel sources in France the years of 1990 and 2010.
Overall, the proportion of each fuel Source amount to disentangle figures in 1990. However, by 2010 the patterns had changed, the figures for one type of fuel source increased, but for remaining fuel sources saw downside trend.
In more detail, the percentage of nuclear power exhibited pronounced increase . In 1990, the figures for nuclear power comprised only 17% , but by 2010 the proportion of this fuel source increased significantly to 67% after 20 years. Whereas the percentage of coal was 28%( the highest percentage on the chart) and figure for oil was 22% , by 2010 , these figures, however, reduced noticeably to the same amount 13% respectively.
In contrast, the percentage disperancy between natural gas and hydro power was pronounced in 1990, but both of them experienced the same downside trend. The figure for the former constituted 28%, being the highest figure on the chart and the latter was at the chart lowest of 6%. By 2010, this disperancy narrowed down, with respective figures of 13% and mere 2%