The pie chart illustrates the percentage of five kinds of books such as adult fiction,children’s fiction,biography,travel and others which sold by a bookseller between 1972 and 2012.
Overall,adult fiction increased significantly in 2012,while travel experienced a steady decline over the period.By this time children’s fiction remained stable at about 25%.
In 1972 the biography’s feature was 20%,however this figure slightly decreased to 15% in 1992 and fell dramatically to 8% by 2012.The others percentage remained stable at about 25% and 20% between 1972 and 1992.After that the proportion dropped to 12% by 2012.The children’s fiction books sold 20% by 1972 and slightly rose to 22% by 1992.The figure moderately increased to 25% by 2012.
In contrast,the percentage of adult fiction showed 20% in 1972 and rise gradually to 25% in 1992 and this figure reached a peak of 45% in 2012.The travels proportion started at 15% in 1972 and slightly rise to 18% in 1992,however this ratio fell significantly to 10%.
