The given graph illustrates the amount of American spending on mobile phone and landline phone services per year during a period of 10 years starting from 2001.
As can be seen from the graph, there were significant changes over the investigated period. While the spending on mobile phone services increased dramatically, the figure for the other service dropped considerably.
In 2001, the expenditure of money on the mobile phone service was the lowest, at 200$ per year. The figure for the landline phone service was higher, at 700$ annual.
In a period between 2001 and 2005, the amount of money spending on mobile phone service witnessed a significant increase. By contrast, on the same period, there was a noticeable decrease in the figure of landline phone service. By the year 2006, both services have reached the same value at 500$. In the 2007-2010 period, the spending on mobile phone service kept rising steadily to 750$ on 2010, and the amount of money which spending on landline phone fall constantly to 400$