The line graph shows changes in the amount of average yearly spending of consumers in America on different call services from 2001 to 2010.
Overall, the figures for cell phone services and international fixed-line services adhered to rising trends(1), albeit at varying degrees, while the reverse was true for national fixed-line services(2). It is also clear that the rise in the annual expenditure on cell phone services experienced the most pronounced change(3) in the chart, overtaking national fixed-line services in the second half of the period(4).
The figures for cell phone services and national fixed-line services mirrored each other. Starting at $700 in 2001, the latter dropped steadily over the study period, declining to $500 in 2006. In contrast, the average annual spending on cell phone services followed consistently rising patterns, which increased to $500 and converged with that for national fixed-line in 2006, up from $200 in 2001. Both these figures then continued their trajectories, with the amount of money spent on cell phone calls reaching a chart high of around $750 in 2010 and overtaking that for national calls that closed the period with $400.
The average for international fixed-line services exhibited negligible trends. The expenditure made by consumers on this type of services grew marginally from around $270 in 2001 to just over $300 in 2003, after which it dipped to exactly $300 in the next year before remaining almost unchanged until the end of the period.