population vital statistics
·2,447,543篇论文数据，部分数据来源于NoteExpress
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Over 100 countries, representing more than two-thirds of the world's population, do not have systems for civil registration and vital statistics that produce reliable data on causes of death.
共有100多个国家(占全球三分之二以上人口)缺乏能够提供可靠死因数据的民事登记和生命统计系统。
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