The bar chart illustrates the sales done in books of different categories in the year between 2002 to 2012. Overall, it is clear that the most sold reading materials were history books and hobbies books were least sold over the 10-year period.
the largest amount of books sold were the books on history, which started off with 4500 copies in the year 2002. Later on, it experienced a steady increase and reached to approximately 5000 copies sold during 2004. In 2008 the sales peaked and almost increased to 1000 copies of the history books were purchased. But this group experienced a sales drop to 8500 copies in 2010, and after two years the sales on this category of books stopped at 9000 copies.
Meanwhile the art books had a considerable increase in sales, it started with selling in 2002 with only around 1600 copies and ended reaching up to 4000 copies by 2012. On the other side, Entertainment and hobbies books were only brought by a small group of people, which is less than 2000 copies. Meanwhile, over time, in 2012 sales on hobbies books category remained almost at its starting point, with 500 copies. But the entertainment books reached to a larger group of individuals, after 10 years of gradual increase it subsequently demonstrated the figures of nearly 3000 copies sold.