The chart presents the total number of minutes of phone calls in Australia, by billions, which are in three groups, between 2001 and 2008.
Overall, Local calls are on the top, despite the decreasing at the end, and the National, International calls remained stable, being on the average. Third category are Mobiles, these were increased during the period, starting with less numbers.
The Local calls had begun with high quantity of numbers, (72) in 2001, and increased consistently to 2005. However, in 2006 it was decreased to 84 from 90, and then continued to decrease. In 2008, it had dropped to 72, how it was in the 2001. The National and International telephone calls had stable increased whole the period, and from 2007 to 2008, had seen a slight increase, (only 1).
Therefore, Mobiles was the lowest at the beggining, with 2 numbers, but had risen all the time. In 2005 it had included 12, and increased dramatically 23, and then significantly increased to 2008. As a result, despite the increasing and decreasing calls, by categories, the diiference among them, stayed the same, how it was at he start.