Please help me check my Ielts essay task 1. Thank you so much.

*Topic: The graph below shows consumers' average annual expenditure on cell phone, national and international fixed-line and services in America between 2001 and 2010.

* My Essay:

The provided line graph illustrates the average amount of money spent yearly on mobile phones, national and international landline phones in American over the nine-year period. As is observed, while the period between 2001 and 2010 witnessed a sharp rise in the usage of cell phone, national fixed-line services decrease gradually. There was only a slight change in international fixed –line spending.

In 2001, domestic landline was the most popular form of communication with the expenditure of $700 per year, in comparison to $200 of cell phone services and almost $250 of oversea landline services. Over the next five years, the amount of money spent on mobile phone accounted for $500 and that was same for national fixed-line services after a fall of $200. International fixed-line services saw a plateau of $300 ever since.

In 2010, American people spent well over $700 on mobile phone services, which was about 2.5 times as much as national and international fixed-line services.