Add the imbalance of boys to girls, they won't need it for much longer

Beijing rules out changes to one-child policy - World - theage.com.au

From the story:

China's birth rate fell from 5.83 children per couple in the early 1970s to 2.1 children in 1990 and is now 1.8.

The original harsh policing, which involved widespread sterilisation, was replaced in the early 1990s by economic incentives to limit families to one child after widespread condemnation.

Mr Zhang acknowledged that abuses were still occurring but said authorities were cracking down on gender-selective abortions to correct the huge gender imbalance favouring males.