The bar chart depicts the proportion of discounts offer by a bookseller from 1970 to 2012.
Overall, it can be seen that there was an significant decline in the proportion of biography, travel and other categories., while an increase was seen in the figures for children’s fiction and adult fiction. In addition, adult fiction had the largest share of sales, whereas the figure for biography was the lowest in all three years
The percentage of adult fiction started at 20% , after which it saw significant rise to 45% in 2012. In contrast, children’s fiction began at only 20%in 1972 , with a subsequent increase to 25% one years later . As a result , the figure for travel responsed rise from 15% to 18% in 1992, but then dropped to 10% in 2012.
The proportion of biography experienced a decline , falling from 20% in 1972 to just 8% in 2012 . A similar change can be seen in the figure of other category, which dropped from 25% to only 12% over the period.