The given pie charts provide data on percentage of five kinds of books sold by a bookseller from 1972 to 2012.
Overall, the most popular type of books in 1972 was , while in 1992 and 2012, the leading position was held by adult fiction. The travel books were sold the least in 1972, and biography was the least popular genre in other years.
In detail, in 1972, three fifths of book sells were distributed equally to biography, adult fiction and children’s fiction books. The travel books took 15% of sells, and remaining 25% of sales were books of other genres. In 1992, travel books and both adult and children’s fiction books sales started to grow, taking 18%, 25% and 22% of all sales, respectively. On the contrary, biography and other types of books experienced a loss in demand, having only 15% and 20% of sales, respectively.
In 2012, the most popular books were of adult fiction type, taking 45% of sales. It is followed by children’s fiction with 25%. Biography, travel and other types of books took 8%, 10% and 12% of sales, respectively.
