The bar chart depicts the proportion of discount at a bookseller from 1970 to 2012.
It can be seen that there was an significant decline in the proportion of biography,travel and others., while an increase was seen in the figures for children’s fiction and adult fiction. In addition, adult fiction have the largest proportion of sales, the figure for biography are the lowest in all three years
The percentage of adult fiction started at 20% , after which it saw significant rise to 45% in 2012. Furthermore, only 20% of children’s fiction in 1972 , with a subsequent increase to 25% 1 years later . As a result , the figure for travel respone rise from 15% to 18% in 1992 then dropped to 10% in 2012.
The proportion of biography followed by a decline to 20% in 1972 to 8% in 2012. A similar change can be seen in the figure of others , which dropped from 25% to only 12% over the period.