The bar chart compares the proportion of books trading across four categories-hobbies books, entertainment books, history books, and art books-from 2002 to 2012.
Overall, history books became significantly more popular throughout the period. while entertainment and art books rise markedly, there was a noticeable increase in hobbies books, before stayed stable at the lowest figure among all categories.
Focusing on blockbuster genre, history, the figure of published copies stood at around 4.3 thousand in 2002, peaking at roughly 10 000 copies after 6 years in 2008. The figure representing a noticeable drop to about 9k copies in the final year. Meanwhile, the number of purchased art books rose markedly reaching at roughly 4 thousand copies from nearly 2000.
By contrast, entertainment books were sold in large rate, constitute at approximately 800 initially. Despite some osicilates over the period, the number of copies show significant growth accounted for 2500 in 2012. Notably, the quantity of traded hobbies books stayed level off after increase minimally from almost 400 in2002 to 500 in 2012.