The given chart illustrates the duration, in millions of minutes, of three types of telephone calls in Finland over a period of ten years from 1995 to 2004.
From a general perspective, it can be observed that the total duration of all three types of calls showed an upward trend over the period. However, the rate of increase varied significantly among the categories.
In 1995, local fixed line calls were the most prevalent, with a total duration of around 12000 million minutes. However, this figure gradually decreased to just above 7000 million minutes in 2004. On the contrary, the total duration of mobile calls witnessed a dramatic increase from approximately 500 million minutes in 1995 to nearly 8500 million minutes in 2004.
The duration of national and international fixed line calls remained relatively stable throughout the period, fluctuating between 6000 and 8000 million minutes. In conclusion, while local fixed line calls declined over the period, mobile calls experienced a significant surge, and national and international fixed line calls remained relatively constant.
