The line graph illustrates the average yearly spending on three phone services: cell phone services, national fixed-line services, and international fixed-line services from 2001 to 2010.
Overall, the three types of services exhibited different trends. Cell phone services were the only category to show an upward trend. In contrast, national fixed-line services experienced a gradual decline, while international fixed-line services remained stable during this period.
In 2001, spending on national fixed-line services was the highest, totaling $700, which was significantly more than the $200 spent on cell phone services and around $250 on international fixed-line services. Subsequently, there was an opposite trend, with a decrease in national fixed-line service spending and an increase in cell phone services. By 2006, the expenditures for both cell phone and national fixed-line services were equal, at $500, while international fixed-line services experienced a slight rise to $300.
From 2006 to 2010, the trends for all three services continued. Cell phone services, which started at the lowest expenditure, ended up with the highest at over $700. Spending on national fixed-line services settled at $400, while international fixed-line services remained constant at $300.