The given charts provide information about the sales of different kinds of books from 1972 to 2012.
Overall, sales of genres like biography, travel and others generally witnessed varying decreases, while the opposite was true in the case of adult and children’s fiction. It is also clear that adult fiction was the most favourite in 1992 and 2012.
In terms of the categories which saw an upward trend, not only were adult fiction’s sales the largest in 2 years but also underwent the most dramatic increase. In particular, the amount of money earned by selling adult fiction had accounted for 20% in 1972 before rising roughly twice to 45% in 2012. Children’s fiction followed a similar pattern, but to a lesser extent. Despite sharing similar figures with adult fiction, sales of children’s fiction increased slightly to 25% over four decades.
Regarding the remaining categories, despite being the leading category at the start, miscellaneous books underwent a dramatic fall, dropping from 25% in 1972 to 12% in 2012. Similarly, the figure for sale in biology decreased sharply, with a fall of 12% from 20% in 1972. Meanwhile, sales of travel had increased negligibly, with a rise of 3% from 15% in 1972 before falling to 10% in 2014.