the chart below shows the total of volume of telephone calls ( in million minutes) in Denmark, devided into three categories, from 1995 to 2004 v.1

There is a prediction about a lower percentage of younger individuals than older people in a many different nations in the upcoming future. While this trend could be positive to some extent, I would argue that it is more negative for the future world. On the one hand, there would be more benefits for countries in having more elder citizens. First, longevity of citizens is seen as a symbol of social progress and it reflects the advancement of medical science and the improvement to people's welfare. For instance, Japanese life span is currently lengthening by advanced medical treatment and well-manufactured food and drug processing. Second, elder people uphold the traditional values and process rich experience, which is extraordinarily valuable in varied sectors of social life. This can be seen in education which knowledge is accumulated by long time and experienced people can share this to next generations. On the other hand, a higher proportion of older people can pose a series of problems to the society as the whole. Firstly, the tension of the pension systems, which is the major source of older people's income. As the decrease in labour workforce, this can affect to the productivity and slow down the economy for a long term. In addition, aged people are prone to disease, government have to invest a huge amount of national budget on medical and health care system for them. All these impose to a heavy burden on the government and taxpayers. In conclusion, while the increasing percentage of aged population could be beneficial to some extent, I believe that it would be a widespread concern in much of the world.