The bar chart compares the number of minutes of telephone calls in the UK from 1995 until 2002, with 3 different types of calls being compared. Namely, local, national and international, and lastly, mobiles.
Generally, the number of local calls consistently surpasses the other two types in every year from 1995 until 2002. However, the gap starts to diminish starting from the year 1999 until 2002. With mobile calls and international calls rising consistently each year.
In terms of local calls, the number of minutes seems to rise from around 70 billion in 1990, to about 90 billion in 1999, then it starts to decline until it reaches a little less than 70 billion in 2002. Starkingly, the number seems to be far less for mobile and international calls, around 2 billion and less than 30 billion, respectively.
However, this gap starts to close with each passing year, with the smallest being in 2002. The number of minutes of mobile calls rose exponentially, peaking at about 50 billion minutes in 2002. Similarly, the total amount for international calls rose, albeit more linearly, with the peak being in 2002, with around 60 billion minutes.
To summarize, albeit the total minutes of international calls and mobile calls arise significantly every year, both are still less than the amount of time for local calls.