The line graph illustrates the changes in the volume of telephone calls in Denmark across three categories—national landline, international landline, and mobile—between 1995 and 2004, measured in million minutes.
Overall, it is clear that mobile phone usage grew substantially over the decade, eventually overtaking national landline calls. Conversely, national landline traffic peaked before declining sharply, while international landline calls showed a slow but steady increase.
In 1995, national landline calls were the most popular, starting at 12 million minutes and climbing steadily to a peak of 16 million minutes in 2000 and 2001. However, this figure dropped significantly thereafter, falling to 9 million minutes by 2004. In contrast, mobile phone usage began at a low of 1 million minutes in 1995. It grew gradually until 2000, followed by a steeper acceleration, ultimately reaching 12 million minutes by 2004, surpassing national landlines.
International landline calls remained the least used category throughout the period. Starting at 6 million minutes in 1995, this category experienced a consistent, modest growth of approximately 0.2 million minutes annually, finishing the period at 7.8 million minutes in 2004.