The given charts show the proportion of book sales between 1972 and 2012.
Overall, it can be clearly seen that over the period the sales of adult and children’s fiction experienced an increase, while biographies, travel books, and other genres declined in popularity.
In 1972, the highest percentage of book purchases came from other genres, which accounted for 25 percent. However, this category showed a steady increase to 12 percent by 2012, while the figure for adult fiction rose sharply from 20 to 45 percent, making it the leading genre by the end of the given period. Children’s fiction recorded the second largest share of sales, growing from one-fifth in 1972 to one-fourth by 2010. Despite the slight rise in the proprtion of travel books sales to 18 percent in 1992, it dropped to 10 percent by 2010. Biography became the least popular genre to customers, which inclined significantly from 20 to 15 percent in 1992, and then roughly dropping in half by the end of the given period.
