the line graph compares people's average annual percentage of spending in three categories such as cell phone services, national fixed-line services, international fixed-line services. Figures are given for 2001 and 2010 in America.
overall, it is clear that the number of cell phone services was the highest. By contrast, the figure for international fixed-line services was the lowest, over the whole-9-year.
people in developed countries for an average of around 3 years, with only a slight increase in years of cell phone services from 2001 to 2003. On the other hand, the number of international fixed-line services decreased around 300 $ between 2001 and 2003.
National fixed-line services fell significantly from 700$ to 500$ in 2006, after which this figure decreased sharply to 400$ in 2010. We can see a significant increase in cell phone services by nearly 500% in 2006. In addition, the cateory of services overtook national fixed-line services as the primary spend of money in America by around 700% in 2010.