The pie charts below show the percentage of five kinds of books sold by a bookseller between 1972 and 2012.

The pie charts illustrate the proportion of five different kinds of books

which

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apply

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sold by a bookstore from 1972 to 2012.

It is clear that

both Adult

fictions

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fiction

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and Children

ones

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apply

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had an upward trend

although

, Biography and the other part showed a downward trend. Regarding

to

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apply

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statistics, what stands out from the scheme is that Adult

fictions

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fiction

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fame increased moderately from 20% to 25% between 1972 to 1992 and

then

rocketed substantially to 45% from 1992 to 2012.

Besides

,

Children

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Children's

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fictions

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fiction

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climbed by 5% slightly between 1972 to 2012.

however

, Biography experienced

minimal

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a minimal

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decrease from 20% to 15%.

In addition

,it followed

this

way and fell to 8% in 2012. As can be seen,

popularity

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the popularity

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of Travel books grew slowly by 3% between 1972 and 1992

while

, since

then

dropped by 10% noticeably. From 1972 to 1992 the Other sector declined marginally by 5% and from 1992 onward,dipped markedly by 8%.