The bar graph compares the four different genres related to books from 2002 to 2012.
Overall, it is clear that the history books was an upward trend while the opposite is true for the hobbies books. It is also worth mentioning that the entartainment showed the same share as the art books over the period.
Looking at the details, the history books sold over 4000copies in 2002, while the entertainment and the art represented the same number in the sale namely 2000. In that year, the hobby books showed the least share and made up over 500 copies. The following 4 years, there was a noticeable fluctuation in all genres as the history books increased double from 4000 to 8000 and the demand for the art and entertainment experienced a slight rise. Both are stand more than 2000 and less than 2500. The figure for the history books reached a peak of the sailing and became the most bestseller books in 2008. The art books went up to 4000 whereas the entertainment soared in 2000 in that year. The next four years, the history books accounted for 8000 and 8500 respectively. The art and entertaiments accounted for the same purchases, the former in 2500, the latter in 4000. As for the hobbies book had always the lowest genre among others all over the period.