the line graph indicated expenditure average annual on cell phone , national and international fixed-line services in periods from 2001 to 2010.
in general, consume on cell phone services is the most significant increased in three factors. international fixed-line services intentions to exchange around 300$. and national fixed -line services dramatically decreased in thought periods.
firstly, cell phone services start with 200$ in 2001. this factor continuous grows in 1 year after that. although the line stops in 1 year at 300$ but after that, it significantly increased from 300$ to 600$, similar to double with original just in 4 years. However, it stops once again in 2007. and it quickly grows between 600$ to nearly 750$ in 2 year last periods.
International fixed-line services light change around 300$ in the first year from 2001 to 2004. and then it stays at unique point is 300$ thought 6 year from 2004 to 2010.
in term of national fixed-line services, it just attention to decreased thought period. it starts 700$ in 2001 and dramatically decreased from this point to 400$.
