The line graph illustrates the average annual spending on mobile phones and house phone services for the period from 2001 to 2010.
Overall, in the period taken into consideration there has been a steady trend to swap from residential phones to cell phones. This can be understood by looking at the lines in the graph.
The line for cell phones representing the average yearly expense has risen steadily during all the years considered in the graph. In 2001 the amount spent on mobile phone services was around $ 200, this figure in 2010 had grew to well above $ 700.
In contrast, the sum spent on residential phone services in a year went from around $ 700 in 2001 to just approximately $ 400 in 2010. In 2006 the same amount of money was spent on both types of services.
