The pie charts provide statistical information about the various types of books that were sold through a bookseller over a 40-year period.
Overall, it is evident that there was an increasing trend in adult fiction and children’s fiction, while the opposite was true for biography and other genres. It is also worth mentioning that the sales of travel books remained relatively stable over the given period.
Looking at the increasing trend, the proportion of adult fiction books saw a slight increase from 20% to 25% between 1972 and 1992, and then jumped to 45% by the end of the period. Additionally, the percentage of children’s fiction books also slightly increased from 20% in 1972 to 22% in 1992 and eventually reached 25% by 2012.
It is clear that the proportions of biography and other genre books were initially at 20% and 25% respectively at the beginning of the period, but by 2012, their figures had continued to decline. It is also notable that the sales of travel books fluctuated around 15% throughout the entire period.