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The charts compare the album sales of some music genres in the US in term of their proportions of total sales in the period of three years from 2008.

Overall, it was clear that people preferred buying rock albums the most in those years. Its percentage stayed the same, at 39%, except for the last year, when there was a tiny 1% increase. Also noticeable was that more and more people in the country showed their predilection toward Coutry music, making its proportion go up gradually over the years, from 13% in 2008, to 18% in 2010, almost as high as R&B.

Having the second and third highest percentages, Alternative and R&B experienced the same decrease pattern over those years, each had slipped 3%, ending up at 20% and 19% respectively in 2010.

Jazz was always the least chosen genre in the surveyed period. Its percentage remained constant, at a humble 3%.

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The three pie charts compare the album sales of some three music genres in the US in terms of their proportions of total album sales in the period of three years from 2008 to 2010.

Overall, it was clear that people preferred buying rock albums the most in those years, while jazz was the least popular.

[ 1] Its The percentage for rock music stayed the same, at was 39% in the first two years and went up to 40% in the last year., except for the last year, when there was a tiny 1% increase. Also noticeable was that more and more people in the country showed their predilection toward Furthermore, the sector representing country music , making its proportion go up gradually over the years, increased steadily from 13% in 2008, to 18% in 2010, ….

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[ 1]: Do not include details in the overall statement.

The rest of your summary is patchy! This is not a difficult exercise. Try to write some more text to cover the remaining genres, and post the revised version below.