The pie charts delineate the proportion of five different genres of books purchased from a bookseller in three years.
Overall, the data indicates a significant increase in the preference for adult’s fiction and children’s fiction over 40 years, while biology, travel, and other unnamed book sales witnessed a dramatic decline. Travel book sales fluctuated over the given period.
Concerning adult’s fiction and children’s fiction, both comprised 20% each in 1972 before accounting for 25% and 22% in 1992, respectively. Moreover, the percentage of these genres reached their peaks in 2012, with adult’s fiction constituting almost half of the total sales (45%) and children’s books contributing an exact quarter (25%)
With regard to the remaining types, biology books, travel books, and other unnamed ones all saw an immense decrease in interest. There was a nearly threefold decline in the preference for biology genres, from 20% in 1972 to a mere 8% in 2012. Similarly, other unnamed book purchases dropped by half over 40 years, from 25% to 12%. However, travel book sales hit its highest point at 18% in 1992 before plummeting to a nadir of 10% in 2012.