The line graph compares the number of people in the world who used five categories of communication services at tow-year intervals from 1998 to 2008. Overall, cellular phone service significantly went up to become by far the most crucial means of communication over a period of 10 years, and meanwhile, mobile broadband and fixed broadband consistently contributed the least parts during the period studied. The number of cellular phone service usage was around about 5 million people in 1998. The figure for people who used cellular phone service increased dramatically to just over 60 million from 1998 to 2008 and became the most common mean of communication. Besides, the figure for Internet service was about five times higher than during the period of 10 years. The figure for landline service was about 15 million people used and was the highest number in 1998. However, the figure had a minor increase to 20 million people in 2006 and then it declined slightly to around 18 million people in 2008. The number of people who used mobile broadband and fixed broadband remained nearly 0 from 1998 to 2004 and rose slightly throughout the remainder of the period. They were also the least popular kinds of communication services during the period of 10 years. 
The line graph compares the  
number
 of  
people
 in the world who  
used
 five categories of  
communication
  services
 at tow-year intervals from 1998 to 2008.  
Overall
, cellular phone  
service
  significantly
 went up to become by far the most crucial means of  
communication
 over a  
period
 of 10 years, and meanwhile, mobile broadband and  
fixed
 broadband  
consistently
 contributed the least parts during the  
period
 studied. The  
number
 of cellular phone  
service
 usage was around about 5  
million
  people
 in 1998. The  
figure
 for  
people
 who  
used
 cellular phone  
service
 increased  
dramatically
 to  
just
 over 60  
million
 from 1998 to 2008 and became the most common mean of  
communication
.  
Besides
, the  
figure
 for Internet  
service
 was about five times higher than during the  
period
 of 10 years. The  
figure
 for landline  
service
 was about 15  
million
  people
  used
 and was the highest  
number
 in 1998.  
However
, the  
figure
 had a minor increase to 20  
million
  people
 in 2006 and then it declined  
slightly
 to around 18  
million
  people
 in 2008. The  
number
 of  
people
 who  
used
 mobile broadband and  
fixed
 broadband remained  
nearly
 0 from 1998 to 2004 and rose  
slightly
 throughout the remainder of the  
period
. They were  
also
 the least popular kinds of  
communication
  services
 during the  
period
 of 10 years.