The pie charts demonstrate the sells of various book genres by one bookseller in given time periods: 1972, 1992 and 2012.
In general, it is evident that books related to travel and biographies seem to have sold out the least; whereas, fiction books for all age groups outnumber all other genres throughout shown years.
The figures of biographical pieces have started off at 20 percent of sells in 1972, lowered by 5 percent in 1992 and constituted 8 percent of all sold-outs at the end of the observation in 2012. Similarly, unlisted genres of literature showcased initial quarter of choice, with stable reduction by 5 and 8 percent in 1992 and 2012 accordingly. Conversely, fiction written for adults made up 20 percent of statistics, followed by a 5 percent increase, reaching the biggest percentage of 45 percent in 2012.
Literature dedicated to travelling showed a fluctuating pattern. At first, travel books accounted for 15 percent of all sold out books in 1972, following a minor rise by 3 percent in 20 years and concluding in 2012 with mere 10 percent of book sells. On the other hand, fiction written for younger generations constituted 20 percent of books with steady marginal growth of roughly 2 and 3 percent during each given time period.