The pie charts illustrate the percentage of energy generated from five different sources, namely Hydropower, Oil, Nuclear power, Coal, Natural gas, in a particular nation between 1983 and 2003.

The given pie charts illustrate how the percentage of power manufactured in a nation changed over a period of 20 years between 1983 and 2003. Looking at the charts from an

overall

perspective, the manufacture of hydropower indicated a plateau during the term,

while

other sorts of energy except oil and coal witnessed an upward tendency. What is more, the proportion of oil always outweighed the others. In detail, the production of hydropower demonstrated a steadiness at 4% throughout the time. In 1983, the ratio of oil accounted for 42% of the energy produced,

however

,

this

figure moved downward slightly by 4% in 2003. The manufacture of coal experienced the same trend, it took a nose dive to 13% in 2003 compared to 23% in 1983. Nuclear power manufacture showed an insignificant leap from 20%

in

Change preposition

at

show examples

the beginning to 24%

at the end

of the period.

Similarly

, the production of natural gas occupied 11% of the pie in 1983,

nevertheless

, the proportion in 2003 illustrated a 2-fold rise to 21%.