The line graph compares average yearly spending by Americans on mobile and landline phone services from 2001 to 2010
It is clear that spending on landline phones fell steadily over the 10-year period, while mobile phone expenditure rose quickly
The year 2006 marks the point at which expenditure on mobile services overtook that for residential phone services
In 2001, US consumers spent an average of nearly $700 on residential phone services, compared to only around $200 on cell phone services
Over the following five years, average yearly spending on landlines dropped by nearly $200
By contrast, expenditure on mobiles rose by approximately $300
In the year 2006, the average American paid out the same amount of money on both types of phone service, spending just over $500 on each