The three pie charts compare the proportion of five types of books, including adult fiction, children’s fiction, biography, travel, and unspecified kinds of books sold by a bookseller in 1972, 1992, and 2012.
Overall, books which include adult fiction and travel contents experienced a significant increase between 1972 to 2012, whereas the remaining categories reduced markedly. Furthermore, despite having the same percentages in the initial year, adult fiction recorded the highest proportions, while biography attracted the least share of readers.
In 1972, unspecific kinds of books were the most popular preferences among buyers, accounting for 25%. This is followed by adult fiction, children’s fiction, and biography, as their corresponding figures stood at one-fifth, at each. At the bottom of this list came travelling books, comprising 15% of readers.
In the next 21 years, the figures for adult fiction ascended considerably to 25% and surpassed unidentified categories, becoming the most prevalent kinds of books sold by a bookseller. Moreover, the figures for travel and biography increased slightly for 2% and 3%, respectively. In addition, adult fiction and unnamed kinds of books witnessed a downward trend of 5%.
In the final year, the figure for adult fiction increased dramatically, reaching 45%, far higher than any other category. Children’s fiction also grew marginally to about 25%, while biography, travel, and other unspecified books fell considerably to approximately 10% each.
