Doing a bit of research, I came across this unbelievable howler (g) in Die Zeit, from the pen of one Sebastian Moll (my translation):
The incarceration rate for black Americans suggest systematic racism in American institutions. 60 percent of American prison inmates are black, although they make up only 30 percent of the population.
It took me approximately 4 seconds in Google to find out that the black population of the United States is 12.6%, and the percent of black prisoners is 39.4%. Of course, this statistic is misleading without the crucial context that blacks commit crimes at much higher rates than whites, but that's another story.