The two graphs show the main sources of energy in the USA in the 1980s and the 1990s, write a report to describe the changes occurred.
The pie charts compared the proportions of power sources falling into 5 distinct groups in the USA from 1980 to 1990.
It is clear that oil remained the major source of energy through the 10-year period while the percentage of hydroelectric power stayed the lowest.
In 1980, the oil segment counted for 42% of total power consumption but lost 9% share during the following decade, dropping dramatically to 33% by 1990. Meanwhile, natural gas and hydroelectric power were stable through 1980 to 1990, with the former category only saw a dip by 1% and reached to 25% later in 1990.
In contrast, as can be seen in the same period, percentage of nuclear power jumped from a mere 5% to 10%, which doubled its proportion of overall energy consumption. Turning to another important trend, the coal segment grew by 5% during the decade. This was 6% lower than the proportion of oil and 2% higher than that of natural gas, making it the second largest group of energy source.
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flaws:
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Attribute Value Ideal
Score: 7.0 out of 9
Category: Good Excellent
No. of Grammatical Errors: 0 2
No. of Spelling Errors: 0 2
No. of Sentences: 7 10
No. of Words: 169 200
No. of Characters: 771 1000
No. of Different Words: 105 100
Fourth Root of Number of Words: 3.606 4.0
Average Word Length: 4.562 4.6
Word Length SD: 2.583 2.4
No. of Words greater than 5 chars: 57 60
No. of Words greater than 6 chars: 36 50
No. of Words greater than 7 chars: 19 40
No. of Words greater than 8 chars: 13 20
Use of Passive Voice (%): 0 0
Avg. Sentence Length: 24.143 21.0
Sentence Length SD: 4.882 7.5
Use of Discourse Markers (%): 0.571 0.12
Sentence-Text Coherence: 0.447 0.35
Sentence-Para Coherence: 0.752 0.50
Sentence-Sentence Coherence: 0.046 0.07
Number of Paragraphs: 4 4