The population of 61 countries is expected to decrease by 1 percent or more between 2022 and 2050 because of a decrease in fertility levels.

由于生育水平的下降，全球61个国家的人口预计将在2022年至2050年期间减少1%或更多。

Behind the slowdown in population growth was the continued decline in births, as a result of a decline in the number of women of childbearing age as well as a decline in fertility levels.

人口增长放缓的背后是出生率持续下降，这是育龄妇女人数下降和生育率下降的结果。