人过七十古来稀
关键词： 地图古稀之年之地图解释
Life Expectancy
Life expectancy is a core factor in the human development index. With 82 years Japan has the highest life expectancy. All 35 countries at the bottom of this list are located in sub-Saharan Africa; their citizen's average life expectancy is between 52 and 39 years.
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