This essay discusses the annual rate of Black-to-White endogamous-group switching by Americans in four topics. The first section, The Average Yearly Rate is Between 0.10 and 0.14 Percent, uses several independent methods to compute the rate of switching. It shows that all converge to the same narrow range of numbers. The Percentage Rate Has Remained Relatively Steady over the Years, demonstrates why we know that Black-to-White group switching has been steady and continuous over the centuries. Our DNA reveals that the current African admixture in White Americans was neither the result of a one-time event before intermarriage was outlawed in 1691, nor the result of intermarriage after Loving v. Virginia 1967 ruled anti-intermarriage laws unconstitutional. How Can so Many People Falsify Their Paper Trail and Cut all Family Ties, explains that, except for a brief period in U.S. history—the Jim Crow era—there has never been a need to deceive nor to cut family ties. For most of the past 300 years, endogamous-group switching was done openly, just as it is today. Finally, The Maroon Escape Hatch suggests how, even during Jim Crow, families could pass from Black to White through a two-step process that included an in-between stage.