The graph illustrates the proportion of car sales registered by manufacturers in South America, North America, Europe and Asia during the span of 4 years, commencing from 2006 to 2010.
Overall, the figure of Asia demonstrated a steady rise while that of North America showed the opposite scenario, and there were some fluctuations recognized in South America and Europe.
Upon closer inspection of the graph, in 2006 the sales of Asia constituted just one fourth of the total figure, however this figure rose dramatically each year to precisely 50% in 2010, which was also the greatest percentage in that year. In contrast, the proportion of North America plummeted from 30% in the first year to the lowest figure of 9% in 2010.
Regarding the percentage of the other regions, the amount of sales for Europe retained the high level when this number fell from 34% to 30% over the period despite some marginal variations. Finally, North America displayed a trivial proportion with 11% in 2006 and then declined considerably to just 5% in 2009 before recovering to the same figure of the initial year in 2010.