世界银行数据显示，撒哈拉以南非洲地区的预期寿命近几十年来一直稳步上升，从1960年的仅40岁上升到今天的60岁。
According to the World Bank, life expectancy in Sub-Saharan Africa has risen steadily in recent decades, from just 40 years in 1960 to 60 years today.