The line graph illustrates the average annual expenditure on three types of communication services—cell phone services, national fixed-line services, and international fixed-line services—over a period of 10 years, from 2001 to 2010.
Overall, expenditure on cell phone services showed a steady upward trend, while spending on national fixed-line services experienced a gradual decline. In contrast, expenditure on international fixed-line services remained relatively stable throughout the period.
In 2001, national fixed-line services had the highest expenditure at around $700, but this figure steadily decreased over the decade, reaching approximately $400 by 2010. On the other hand, spending on cell phone services started at a much lower point, around $200, but witnessed continuous growth. By 2006, it surpassed the national fixed-line services, and by 2010, the expenditure had surged to just under $750, making it the highest among the three services.
Expenditure on international fixed-line services fluctuated slightly over the period but remained relatively constant. It started at about $300 in 2001, rose marginally to $350 by 2003, and then stabilized around $300 until the end of the period.
In summary, the data indicates a clear shift in consumer spending from national fixed-line services to cell phone services, while expenditure on international fixed-line services remained largely unchanged.