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

The pie charts illustrate the changes in the distribution of

energy

production

by different

sources

in the United States between 1983 and 2003. In 1983, oil was the dominant source of

energy

, accounting for 42% of the total

production

.

This

was followed by coal at 23% and natural gas at 20%. Nuclear power and hydropower contributed much less, with 11% and 4%, respectively, making them the least significant

sources

of

energy

during that period. By 2003, there was a noticeable shift in

energy

production

sources

. Oil's share decreased slightly to 38%,

while

coal and natural gas increased to 24% and 21%, respectively. Nuclear power saw a marginal increase to 13%,

whereas

hydropower remained stable at 4%, indicating little change in renewable

energy

reliance.

Overall

, the pie charts show that

although

oil remained the leading

energy

source, there was a gradual diversification of

energy

production

in the United States over the 20-year period, with a slight shift towards more balanced

energy

sources

.