Population have been reduced in my country. Married people don't want to have a chilldren. For example in Korea second big city Busan, these dayes calle 'The old man and the Sea' like classic novels. So Aging is social problem because It reduce worked people. I have seen there are no worked people in city outside. Then, import count increases and export count decreases. It is country economically serious probelm. Young people share social welfare spending but it is more and more heavy. Already, Youn people paid more money when take a subway. It needs socail discussion for future life.