The charts illustrate the number of 5 variety of books selling by a bookseller from 1972 to 2012.
Overall, the percentages of adults’ fiction remained as one of the best-selling books in all time with the opposite of the Biography book. Adittionally, others documents witnessed unoticable changes between the 3 timeline.
On the one hand, the differences of the selling percentages among Adults’ fiction and Others in 1972 and 1992 experienced the gap of 5% with the numbers of 1972 outweighed the numbers in 1992. Moreover, a reversed showed in the propotions of Adults’ fiction while the fraction in the 1992 is 5% more than the number in the 1972.
On the other hand, those propotions mentioned demonstrated a massive changed in 2012 with the percentages of Adults’t fiction overweighed the others 2 years by 45%. Aditionally, Children’s fiction illustrated a trivial different of 5% and 3% respectively compared to the propotions of selling in 1972 and 1992. Furthermore, the Biography propotion showed the least of only 8% in the 2012 while the Travel books and Others witnessed a number of the least 10% and 12% respectively which were lower than both of the percentages of the same catagory in 1972 and 1992.
