The pie charts indicate changes in the proportions of energy produced in a country from 1983 to 2003. Summarize the information by selecting and reporting the main features, and make comparisons where relevant.

The pie graphs illustrate how the percentages of

power

manufactured in a country shift between 1983 and 2003.

Overall

, there was a considerable increase in the proportions of nuclear

power

and natural gas produced,

while

those of hydropower levelled off and remained the lowest ones throughout the period.

By contrast

, the figures for

oil

and coal experienced a decline, but those for

oil

consistently were the biggest parts. In 1983, exactly 42% of the total energy came from

oil

, after which it saw a moderate tumble to 38% in 2003. A similar change can be found in the data for

oil

, which started at 23% and almost halved in the final year of the stage examined.

Conversely

, nuclear

power

contributed 20% to

power

production at the beginning of the period,

then

it rose to reach 24% in 2003. The share of natural gas witnessed a resembling growth, doubling to 21% after 20 years. The opposite trend was seen in those for hydropower, which steadily kept at 4% over two decades.