The pie chart illustrates the proportion of five kinds of books selling by a bookseller in 1972, 1992 and 2012.
Overall, the expenditure of Adult fiction and Children’s fiction are a significant increase in over four decades, while Travel books was a flucluation of sold in each period. Notably, Biography and Others books were dramatically dipped in over a 40-year period.
In 1972, the percentage of other books had the highest rates, at 25%, while the following period it was shows significantly drop down, with 20% in 1992, and at 12% by the final year. In addition, adult fiction and children’s fiction were had an increases those books in upcoming era, with 25% and 45% in adult fiction book, between 1992 and 2012, whereas at 22% to 25% in children’s fiction book at same the period.
In contrast, the expenditure of biography book show has the smallest percentages in 1992 and 2012, at 15% to 8%. Furthermore, travel book a slight rose to 18% by 1992, after that was steadily felling to reach 10% at the end of period.