The pie charts below show the percentage of five kinds of books sold by a bookseller between 1972 and 2012.
The three pie charts compare the popularity of five different kinds of books according to the sales of a bookseller during the period from 1972 to 2012.
In 1972, the percentages of adult fiction and children’s fiction equaled, which were 20%, and then the figures experienced a gradual increase of 5% and 2% in the following 20 years. However, the figure for adult fiction soared to 45% in 2012 while the figure for children’s fiction continued to rise and arrived at 25%.
Biography was less popular than other books in this 40-year period, and the gaps were 5%, 5% and 4% respectively. As to the travel books, they gained the least popularity in 1972, but outnumbered biography in the year 1992 when the figure dropped in the rest years and reached 10% in 2012.
Overall, the proportion of fictions increased remarkably in this period while the popularity of other categories of books had a marked decrease.