The given bar chart compares the proportion of annual telephone calls (in million) of Finnish across 3 different categories from 1995 to 2004.
Overall, the data of 3 categories increased over the period. However, landline usage for calling experienced a sharp plummet in the last 4 years in the diagram.
In 1995, under 2000 million minutes were occupied by using mobiles for calling. This number rose steadily to nearly 3000 million minutes in 1999 before made a significant surge by 7000 million minutes by the end of the period. Similarly, the total time of national and international landline usage for phone calls initially was 2 times higher than the previous group. Then, a slight change in this group can be seen throughout 9 years before it ended the period at approximately 11000 million minutes.
Moving on to the last category, landline using in local, which was noticeable higher than the other categories. At the beginning of the period, there were 12000 million minutes and the data kept rising until reached a peak of 17000 million, before a considerable plunge occurred in the given chart. Interestingly, this number ended the period at the same data at the initial year. Moreover, local landline group still stood at the highest place in 2004 regarding being the only one experienced a drop.