The bar chart given illustrates how much drug was sold totally by companies in four continents including Asia, European and Africa, North America and South America between 2002 and 2006.
Overall, it is obvious from the graph that the only firm finishing the period with an overall increase was the one in Asia whilst the companies in the rest of the regions experienced a decrease in the sale of medicine at the end except South America whose drug company reached the same percentage at last as it was at the beginning after a downward trend in the middle of the period.
In 2002, Asian firm sold 12% of its all remedies that was followed by a rapid growth of 16% till 2006. Similarly, there was a slight rise from 44% to 48% overall in the sale of a drug company in European and Africa before it again saw a decrease of 8% to finish the period.
In terms of North America, a firm of medicine went through a marginal drop from 33 to 21 between 2002 and 2005, and it remained stable within a year till the end. Likewise, a company selling the least percentage accounting for 11% in South America also had a decline of 5% in 2 years after 2002 yet in the following year, it again reached 11% that stayed unchanged till 2006.