The gicen bar chart illustrates the proportion of the total income of a drug company in four districts regions between 2002 and 2006.
A basis assessment of the given data reveals that the index of European and Africa emerged as a dominant figure, consistently surpassing all other countries throughout the years, whereas the figure of South America represented only a small share across the table.
Looking more specifically at the data, the category of European and Africa witnessed a growth from 44% to 48% between 2002 and 2004. In contrast, it demonstrated a downward trend and received 40% in 2006. Moreover, the income of North America in 2002 was far higher than 2003 at 33% and 28% respectively. The total sales of North Americ exhibited gradual but consistent drop and accounted 21% in 2005 and 2006.
Turning to the relatively smaller figures, the figure of Asia illustrated an upward trend, started with 12% in 2002 opposed to 2006 where index comprised of 28%. Despite dwindling to 6% in 2004, the indicator of South America then witnessed a surge and received 11% untill the given time frame.