Given are pie charts reviewing data regarding the changes in the proportion of sold books in different genres by bookseller over a span of five decades, between 1972 and 2012.
Overall, the portions of adult and children’s fiction books exhibited a trajectory of an upward trend, yet the reverse was true for all the remaining genres, albeit at varying degrees. Furthermore, despite of unspecified genre was being more purchased in 1972, it had been surpassed by adult fiction books, that became the most popular genre in 2012, followed closely by children’s fiction books with moderate popularity and distantly by biography and travel books with rather low prevalence.
Turning to the statistics, at the beginning of the period, the percentage of Unspecified genre of books was responsible for relatively a quarter in 1972, and then this figure decreased by 13% within four decades. Adult and Children’s fiction genres, however, observed an upward trend. Initially, the proportion of Adult fiction and Children’s fiction shared the same percentage, namely 20%. Afterwards, the share of Children’s fiction witnessed a gradual growth during the subsequent years, eventually reaching 25% in 2012. Meanwhile, Adults fiction demonstrated a substantial rise in book sales, which accounted for a lion’s share of the pie, making up a half of sales in 2012.
Shifting the focus now on the remaining two categories, the proportion of Biography books started off at 20%, prior to a consistent drop of 12% in 2012. The share of Travel genre was comprised of 3/20 in 1972, then it saw a tiny rise of 3% in 1992, before declining back to 10% 2012.