1998年 ,联合国人口司首次对全球高龄老人 (即年岁在 80岁及以上者 )的人口学特征做了详细的评估和预测 ,即对世界各国年龄在 80～ 90岁、90～ 99岁和 10 0岁及以上的高龄老人拥有量进行了分组估测。1998年 ,全球年龄在 80岁及以上的老年人共计 6 6 0 0万人 ,占世界总人口的 1 In 1998, for the first time, the United Nations Population Division made a detailed assessment and prediction of the demographic characteristics of the world’s elderly people aged 80 years and over. That is, the demographic characteristics of the world population aged 80-90, 90-99 and The number of elderly people aged 10 years and over was estimated by grouping. In 1998, the total number of elderly people aged 80 and over in the world totaled 660 million, accounting for 1 of the world’s total population