The diagrams below provides statistics in percents about categories of books selled to customers in 1972, 1992 and 2012. Groups marked with various colours and separated from each other.
The greatest rising is connected with Adult fiction which changed from 20% in 1972 to 45% in 2012 and at the same time period Biograthy jenre turned from 20% to 8% because of potential need in stories which provides adrenaline and less interest to famous figures nowadays. The most persistent and constantly kind of book is Children’s fiction due to obvious sustainable need in developing kids immagination.
By looking at the whole graphs, category of Travel transformed from 15% in 1972 to 10% in 2012 with rising to 18% in 1992. When we count on Others kinds of book it translated from 25% in 1972, 20% in 1992 and 12% in 2012. The last picture proofs a recession in popularity of an accurate book types which do not match the customers demand.