The provided line graph presents data about the money people spent on cell phone services, as well as national and international fixed-line services over a period of ten years, from 2001 to 2010.
A glance at the graph reveals that while the majority of people chose to spend on cell phone services, leading to an upward trend in costs for these services, national fixed-line services displayed a downward trend. Although national fixed-line services were the most popular choice at the beginning of the period, they began to decline after that.
It is clear that at the beginning, national fixed-line services were the most favored and dominant option compared to the others. In 2002, their usage decreased significantly before plateauing for the remainder of the period, hitting the lowest point at $400. Meanwhile, international fixed-line services gradually rose between 2001 and 2003, peaking at just above $300 in 2003, followed by a stable decrease in the subsequent year. These services remained unchanged until the end of the period.
The yearly expenditure on cell phones shows a notable evolution. Although cell phone services were the least utilized in the initial period, they nonetheless experienced a significant uplift. Payments for cell phones skyrocketed from 2003 to 2007, surpassing both national and international services, and remained constant in 2008. In 2009 and 2010, expenditures on cell phones reached their highest point at approximately $710, making them the most popular choice for consumers during this period.