รายละเอียดตัวอย่าง

The line graph depicts the proportion of people spending money using three different devices ( cell phone services, international fixed-line and national fixed-line services) from 2001 to 2010. Overall, it is clear that the average annual spending on national fixed-line services witnessed a downward trend, while the opposite was true for international fixed- line services. Additionally, cell phone services recorded the highest expenditure at the end of the period. Spending on national fixed-line services showed the highest consumption of about $700 in 2001 and decreased slowly to about $500 in 2006, continuing to decrease to about $400 in 2010. Next, spending on International fixed-line services consumed a peak at about $280 in 2001, increasing significantly to about $320 in 2003 and after leveling off until 2010. In contrast, pending on cell phone services started at about $200 in 2001, then its growth was dramatic to about $500 in 2006 and continued , ending at around $700 in 2010, becoming the highest figure.