The figure illustrates five genres sold in one library, over a span of 40 years, from 1972 to 2012.
Overall, in first years other books sold in large number, but by the end the year, the most common genre was adult fiction books. Another type of books sold rate dropped by 2012.
In 1972, children’s and adult fiction books and biography sold, each accounting 20%. By 1992, these genres experienced increase and decreases. Adult and children’s fiction books sold more frequently rather than biographies (15%). Adults fiction book series sold moderately by the 2012. Meanwhile, biographies were sold in less quantity.
In initial years, travel books were a least popular option in library, with only 15%. While, others type of books were dominant sold genre in bookseller. Over the years, dependence on travel books rised, when others type sold lesser. In the end of time range, both two genre books sold less, ranging from 10 and 12%.