The line graph illustrates the average yearly spending of consumers on cell phone, national and international fixed-line services in the US from 2001 to 2010.
Overall, it is clear that while the annual expenditure on mobile phones tended to dramatic increase, the spending on national fixed-line witnessed a considerable drop. Additionally, the expenditure on international fixed-line services remained relatively stable and was the lowest throughout most of the period.
In 2001, expenditure on cell phone was lowest at around $200,whereas spending on national fixed-line services was at its peak, reaching approximately $700.In the next 5 years, the spending on mobile phones increased significantly, the number of consumers surpassed national fixed-line services and stood at $600 in 2007.In 2010, expenditure on cell phone reach its peak at about $750,was highest compared to the counterparts. By contrast, the average yearly spending of consumers on national fixed-line services just led the figure in 2001. Then,in the following years, national fixed-line services users saw a downward trend and reach a low $400 in 2010.
As for international fixed-line services,average annual expenditure at around $250,three years later, the figure fluctuated slightly. From the year 2004 onwards,it can be seen that the average yearly expenditure on international fixed-line services remained relatively stable.