The Pie charts display the sales of five varieties of books from 1972 and 2012.
The most noticeable trend is that the number of adult fiction books bought greatly increased while other books decreased significantly. Children’s books slightly grew, whereas travel books and biographies shrunk in size.
Adult and children’s fiction, alongside with biographies, started with the same ratio of twenty percent. But over the years, customer-preference shifted to the adult category, dominating with over forty percent. In contrast, biographies exhibited the greatest decline in demand for a single category, going down to the least purchased. Children’s books, on the other hand, showed a slow and steady rise.
Other types of books initially sold the most units, but were diminished with less than half of the amount of buyers left in 2012. Travel books showed a fluctuation in sales. It held the least purchases back in 1972, and went up by three percent in 1992. But at the end of the period, it went back down to just ten percent.
