he line graph shows how much money American consumers spent on average each year on three types of services, which are cell phones, national fixed-line, and international fixed-line, between 2001 and 2010.
Overall, spending on cell phone services increased a lot during this period and became the highest in the end. On the other hand, spending on national fixed-line services decreased, while international fixed-line services did not change much.
In 2001, people spent the most money on national fixed-line services at about $700, and cell phone services was the lowest at around $200. After that, the situation changed. The amount spent on cell phones went up steadily and passed national fixed-line services in 2006 at about $550. It continued to increase until it reached around $750 in 2010, which was the highest point.
At the same time, spending on national fixed-line services went down continuously and dropped to about $400 at the end of the period. For international fixed-line services, the spending started at about $250 and rose slightly to $300 in 2003. Then it stayed almost the same for the rest of the years and finished at a little over $300.