Racial breakdown on WHO is having the abortions would be a very interesting set of data points.
The CDC keeps detailed stats on who is having the abortions. Blacks, followed by Hispanics, are responsible for the majority of abortions. Poor women have significantly more abortions than middle class or rich women.
The fact that abortion rates differ so drastically between different demographic groups puts the lie to the pro-abort claim that women are not being irresponsible when they choose to get pregnant with a child they plan to abort. They want us all to believe that women have no control over whether they get pregnant, and that abortion is therefore necessary to keep women from becoming baby machines.