| 摘 要： | Researchers forecast that in the 2100s, China willexperience four periods of population aging:Period of accelerated increase (1999-2010): Theproportion of the elderly will rise by an annualaverage of 0.1 percentage point. China has alreadybecome all aged society; however, the pace of aginghas not been so fast.Period of fast increase (2010-2040): This is theperiod when China's population aging develops thefastest. Annually, the proportion will increase by 0.4percentage point oil average.Perio…
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