自1999年起，美国将修改调整年龄死亡率的人口标准（以下简称标准），将2000年的人口作为标准人口。修改后的标准将被美国卫生与健康服务部门、各州卫生部门和其他部门采用。美国卫生统计中心一直沿用1940年的标准人口，美国国立癌症研究所的癌症监察、流行病学调查和结果项目 Since 1999, the United States will revise the population standard for adjusting the age-related death rate (hereinafter referred to as the standard) and use the 2000 population as the standard population. The revised standards will be adopted by the U.S. Department of Health and Human Services, State Departments of Health, and other departments. The U.S. Center for Health Statistics has been using the standard population of 1940, Cancer Surveillance, Epidemiological Survey and Outcomes Program of the National Cancer Institute of the United States.