The given bar graph portrays the total amount of minutes of telephone calls in the UK between 1995 and 2002, which is categorized into three different types: local, national and international, and mobiles. Units are measured in billions.
Overall, the most noticeable trends are that there was ever-escalating growth in terms of ‘Mobiles’ and ‘National and International’ telephone calls, while the share of the remaining category had fluctuated over time.
On the one hand, with regards to the amount of national and international telephone calls, in 1995, it accounted for around 38 billion minutes, after which it encountered a moderate surge to well over 3 billion. Next, it marginally went up by a few percentage points each year. Likewise, as far as the contribution of mobiles is concerned, in the first year, it ranked the lowest among all segments at nearly 3 billion. After that, it slowly rose to 10 billion within five years. Subsequent to that, in 2002, there was more than a 14-fold increase (almost 42 billion) in the mobiles category.
On the contrary, at the beginning of the time-frame, a well above 90 billion expend was reported for local telephone lines before falling dramatically to nearly 68 billion.