人口计算然后以这5个数据为已知数据，来预测未来5年的人口老龄化指数，进而分析我国今后短期内的人口结构变化情况。我们采用二次拟合的方法，用抛物线对已知数据进行拟合，并对未来5年的人口老龄化指数进行预测 ，得到结果如下表：-Population predictionIt is reported that the world’s population was 6 billion in the year 2,000, and it is growing faster and faster. The world’s population problem is the greatest one because it brings lots of problems, such as water resources problem, more and more people losing their jobs and so on. These problems are mainly in the developing countries because the population of the developing countries is over 4/ 5 of the world’s popuation. So China, the largest developing country, has kept the policy “one couple, one child.”