The pie charts depicts how the percentage of five types of books sold by a bookseller between in the year 1972 and 2012.
Overall, it can be clearly seen that, adult contributed the highest segment of sales while biography become lowest at the end of year.
Turning to details, in commence with 1972 craze of adult , children fiction and biography selling rate is equal at 20% but after 20 year in 1992 Adult story gradually rose at 25% and child novel used slightly expand at 22% and bio is decline dramatically to 15% .
In other hand, at the last period youth story sales rate is quickly grew at 45% in 2012 . Similarly, Child novel is slowly went up at 25% while biography drop at decreasing rate in every year comparison to others. Likewise, In the beginning Travel is 15% and after 20 years in 1992 it raise slowly at 18% and in the final year travel is drop at 10% in 2012.