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The bar chart compares the percentage of total revenues made by a drug company in distinct regions between 2002 and 2006. Overall, it is evident that the percentage of a drug company sales in Asia showed an upward trend over a 4-year period whereas the figure for America illustrated a downward trend during the period. It is also noticeable that the proportion of a drug's company revenues in Europe fluctuated slightly. From 2002 to 2004, the figure for a drug company's sales in Asia reocrded the lowest figure in 2002, at just 25%, which was considerably than that in Asia and Europe, with the figures of 34% and 41%, respectively. There was a overwhelming increase in those figures in 2003, at 30% for Asia, 35% for Europe and America. In 2004, with the exception of the proportion of a drug company sales in America delcined to 27%, the figure for Asia and Europe registered marginal growth, at 35% and 38%, correspondingly. Between 2005 to 2006, the figure for Asia still rocketed rapidly, with the figures of 37% in 2005 and 40% in 2006, occupided the first place on the entire chart. Conversely, a significant decrease was recorded in the percentage of a drug company's revenues from 34% in 2005 to only three tenths at the end of the period. A simialr trend can be seen in America, with the figures of 29% in 2005. After that there was a slight increase to 30% in 2006