The two graphs show the main sources of energy in the USA in the 1980s and the 1990s.

The pie chart illustrates the energy production from 5 different sources (oil, natural gas, coal, hydroeletric power and nuclear power) in the US in 2 different years (1980 and 1990).
Overall, it is clear that oil produced the most energy in both years as oppsed to energy production from hydroeletric power at the at the same time. Furthermore, a significant increase in the energy production from coal and nuclear power while a slight drop in that of natrual gas and oil.
The proportion of energy produced by oil accounted for 42% in 1980 and then dropped to a third (33%). The amount of energy production from hydroeletric power remained constant at mere 5% in both years.
From 1980 to 1990, there was a considerable increase in the figures of coal as well as nuclear power (from 5% to 10% and from 22% to 27% respectively). Whereas, the energy generated by natural gas, which was the second source of energy in the USA in 1980 fell by 1% to a quarter (25%) in 1990.

Votes
Average: 5.6 (1 vote)
Essays by the user:

Grammar and spelling errors:
Line 2, column 125, Rule ID: PHRASE_REPETITION[1]
Message: This phrase is duplicated. You should probably leave only 'at the'.
Suggestion: at the
...ergy production from hydroeletric power at the at the same time. Furthermore, a significant i...
^^^^^^^^^^^^^

Transition Words or Phrases used:
furthermore, if, second, so, then, third, well, whereas, while, as well as

Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments

Performance on Part of Speech:
To be verbs : 3.0 7.0 43% => More to be verbs wanted.
Auxiliary verbs: 0.0 1.00243902439 0% => OK
Conjunction : 6.0 6.8 88% => OK
Relative clauses : 3.0 3.15609756098 95% => OK
Pronoun: 4.0 5.60731707317 71% => OK
Preposition: 35.0 33.7804878049 104% => OK
Nominalization: 5.0 3.97073170732 126% => OK

Performance on vocabulary words:
No of characters: 795.0 965.302439024 82% => OK
No of words: 173.0 196.424390244 88% => More content wanted.
Chars per words: 4.59537572254 4.92477711251 93% => OK
Fourth root words length: 3.62669911048 3.73543355544 97% => OK
Word Length SD: 2.7017788723 2.65546596893 102% => OK
Unique words: 86.0 106.607317073 81% => More unique words wanted.
Unique words percentage: 0.49710982659 0.547539520022 91% => More unique words wanted or less content wanted.
syllable_count: 233.1 283.868780488 82% => OK
avg_syllables_per_word: 1.3 1.45097560976 90% => OK

A sentence (or a clause, phrase) starts by:
Pronoun: 1.0 1.53170731707 65% => OK
Article: 5.0 4.33902439024 115% => OK
Subordination: 0.0 1.07073170732 0% => More adverbial clause wanted.
Conjunction: 0.0 0.482926829268 0% => OK
Preposition: 1.0 3.36585365854 30% => More preposition wanted as sentence beginning.

Performance on sentences:
How many sentences: 7.0 8.94146341463 78% => Need more sentences. Double check the format of sentences, make sure there is a space between two sentences, or have enough periods. And also check the lengths of sentences, maybe they are too long.
Sentence length: 24.0 22.4926829268 107% => OK
Sentence length SD: 26.5245361959 43.030603864 62% => OK
Chars per sentence: 113.571428571 112.824112599 101% => OK
Words per sentence: 24.7142857143 22.9334400587 108% => OK
Discourse Markers: 10.5714285714 5.23603664747 202% => Less transition words/phrases wanted.
Paragraphs: 4.0 3.83414634146 104% => OK
Language errors: 1.0 1.69756097561 59% => OK
Sentences with positive sentiment : 7.0 3.70975609756 189% => OK
Sentences with negative sentiment : 0.0 1.13902439024 0% => More negative sentences wanted.
Sentences with neutral sentiment: 0.0 4.09268292683 0% => More facts, knowledge or examples wanted.
What are sentences with positive/Negative/neutral sentiment?

Coherence and Cohesion:
Essay topic to essay body coherence: 0.118255176105 0.215688989381 55% => OK
Sentence topic coherence: 0.0698468581624 0.103423049105 68% => OK
Sentence topic coherence SD: 0.0544818959644 0.0843802449381 65% => OK
Paragraph topic coherence: 0.0832789741103 0.15604864568 53% => OK
Paragraph topic coherence SD: 0.0163779612702 0.0819641961636 20% => Paragraphs are similar to each other. Some content may get duplicated or it is not exactly right on the topic.

Essay readability:
automated_readability_index: 12.6 13.2329268293 95% => OK
flesch_reading_ease: 72.5 61.2550243902 118% => OK
smog_index: 8.8 6.51609756098 135% => OK
flesch_kincaid_grade: 9.1 10.3012195122 88% => OK
coleman_liau_index: 9.7 11.4140731707 85% => OK
dale_chall_readability_score: 7.11 8.06136585366 88% => OK
difficult_words: 25.0 40.7170731707 61% => More difficult words wanted.
linsear_write_formula: 13.5 11.4329268293 118% => OK
gunning_fog: 11.6 10.9970731707 105% => OK
text_standard: 10.0 11.0658536585 90% => OK
What are above readability scores?

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Rates: 56.1797752809 out of 100
Scores by essay e-grader: 5.0 Out of 9
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Note: the e-grader does NOT examine the meaning of words and ideas. VIP users will receive further evaluations by advanced module of e-grader and human graders.