Really! ? You are still using Numbers USA as a source? Numbers USA is a green, zero population organization.
"Dr. Tanton founded local chapters of Planned Parenthood and the Sierra Club and became the national president of Zero Population Growth. Unable to interest colleagues in fighting immigration, he formed FAIR in 1979, pledging in his proposal to make it centrist/liberal in political orientation. The first director, Roger Conner, had made his mark as a liberal environmental advocate. . . . Source