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

The bar chart compares the duration of telephone calls made by different lines in the UK between 1995 and 2002

Obviously, local-fixed line was the most common call type in this nation over that time. The numbers of minutes of telephone calls using national and international – fixed line and mobiles increased, but the figure for local-fixed line rose and then fell back.

In 1995, local-fixed line was used to make calls during more than 70 billion minutes, doubling the figure for national and international-fixed line. At that time, mobile phone was not a common way to make call, with its total duration being only about 3 billion minutes.

From that year to 1999, local fixed line was used more frequently, with its figure reaching 90 billion minutes, but four years after that, this figure fell back to the initial point. In comparison, national and international-fixed line usage climbed gradually to 60 billion minutes, compared to a sharper growth in the duration of mobile phone calls which recorded around 45 billion minutes in 2002.