The chart shows the total number of minutes (in billions) of telephone calls in the UK, divided into three categories, from 1995 - 2002.

Question

The diagram illustrates a comparison between the amounts of time spent on three types of telephone calls in the UK from 1995 to 2002. Overall, the usage of mobiles went up significantly while there was a slight increase in the rate of national and international fixed lines. By contrast, local-fixed line usage increased steadily and then fell to the same point as at the beginning. In general, the usage of mobiles changed the most but was still the lowest rate, the amounts of time spent on local-fixed lines was always the highest.

As can be seen from the graph, the figure for mobiles increased steadily from about 4 billion minutes in 1995 to over 11 billion minutes in 1999. Then, usage experienced a substantial rise from over 11 billion minutes in 1999 to approximately 45 billion minutes in 2002. Similarly, the number of minutes spent on national and international-fixed lines grew slightly by about 3-4 billion minutes every year from over 37 billion minutes in 1995 to 45 billion minutes in 2002.

In regard to local-fixed line usage, the rate increased slightly from over 70 billion minutes in1995 to 90 billion minutes in 1999 before going down from 90 billion minutes in 1999 to 70 billion minutes in 2002, which was the same point as at started.