The given bar graph illustrates the share of a drug company’s sales in four regions in five consecutive years starting in 2002. Overall, the figures for Europe and Africa combined and North America decreased, whereas that of Asia increased significantly and South America stayed relatively unchanged despite some fluctuations. Furthermore, the proportion of revenue in Europe and Africa consistently registered the highest statistics throughout the period.
Regarding European and African along with Asian figures, the former started at 44% then grew slightly by 4% to a peak of about a half in 2004 before declining to a low of 40% at the end of the period. By contrast, the statistics in Asia experienced a rapid growth of 16% from a low point of 12% initially to a high of 28% in 2006.
Concerning sales in the two other areas, North America accounted for approximately a third of total sales in 2002 but subsequently plunged to 21% in 2005, and then remained unchanged to end the surveyed period at 2nd place. Conversely, only 11% of aggregate revenue came from South America in 2002, and then this almost halved to a minor 6% in 2004 before recovering to the starting figure in 2006.