The pie chats illustrate how much money made of the different types of book for readers from 1972 to 2012.
Overall, at the beginning of the year all types of book approximately equal. There was other types of book showed high proportion and travel was lowest. In the middle of the year persentage of each types of book slightly changed. At the end of the year, income from adult’s fiction was the biggest slice while biography was smallest piece.
In 1972, sales of books was considerably equal. Biography, children’s fiction, and adult’s fiction showed at 20%. However in this year booksellers found much money from other types of book and it was at 25% while books about travel was smallest at 15%. By 1992, adult’s fiction, children’s fiction and other types of book experiensed higher than 20%. In contrast books about travel incersed at 18% while biography declined at 15%.
The last year in 2012, proportion fully changed. Book about adult’s fiction accounted for most significant persentage at 45% than other years. Additionally, children’s fiction also made up high sale at 25%. Income from biography, travel, and other types of books declined under 15%.