The graph compares how many minutes of calls people in Denmark made using three options over a decade starting from 1995.
Overall, the most striking change was a substantial increase in the volume of mobile phone calls, compared to international landline, which grew marginally. The total duration of calls made over national landline, on the other hand, had declined by the end, being surpassed by mobile phone calls.
Regarding mobile calls, despite initially being the least popular mode of correspondence with a chart-low of around 1 million minutes in 1995, mobile phones were being used increasingly more in the subsequent years. In fact, the figure for this option had tripled by 2000 before shooting up to 12 million minutes of calls in 2004.
The figure for international landline calls also grew, albeit minimally. Starting at 6 million minutes of calls in 1995, it went up slowly to roughly 8 million minutes of calls in the final year.
The pattern of change for national landline, however, was somewhat unexpected. Until 2001, the volume of calls made over this option went up gradually to its all-time high of about 16 million minutes, but it was followed by an abrupt drop to its lowest point of 8 million minutes of calls, nearly converging with international landline.