The chart below shows the total number of minutes in billions of telephone calls in the UK divided into three categories from 1995 2002

The given bar chart reveals how many minutes used in three separate sorts of telephone calls namely local-fixed line, national and international-fixed line and mobiles in the UK and their changes at 1-year interval commencing in 1995 and ending in 2002.
Overall, the total number of minutes for local-fixed line has by far the highest figure among these categories and the opposite was true for mobiles.
At the beginning, the local-fixed line was witnessed at a little over 70 billion minutes in 1995. Meanwhile, national and international - fixed line was only twice lower than local-fixed line with approximately 38 billion minutes. The mobiles was merely around one-third of 10 billion minutes. Over the next 4 years, these kinds of telephone calls were similar in terms of general increase. In particular, local-fixed line peaked at 90 minutes which was the highest data surveyed during 8 years studied while national and international-fixed line and mobiles stood at 50 billion minutes and roughly 13 billion minutes respectively.
From 1995 onwards, the figures for local – fixed line which were seen in an opposite trend compared to two remaining kinds gradually declined to finished at over 70 billion minutes as opposed to national and international – fixed line and mobiles remarkably proliferated during the three final years, about 71 billion and 45 billion in minutes respectively.