Just for you (I believe most citations are taken from biased web sites and are worthless) I am offering a citation from Walter Williams, a black conservative whose facts i'm sure you will reject.  http://www.desototimes.com/opinion/editorials/black-female-head-of-households-number-is-percent/article_26f8f3e2-f7bb-5a6e-b605-9c67678e9e20.html