Yes, I realize that. The number of black men imprisoned on drug crimes is so disproportionately high in relation to the ratio (nearly 1:1) of blacks vs whites 'charged' for drug crimes is a big part of why you are incorrect in the assumption that a 900% ratio compared to white prisoners is due to white men committing fewer crimes. There are several books out about it, even. It's widely known as 'the new jim crow'. The war on drugs is a particularly harsh thing for black men who, while getting caught and often charged at a nearly even rate, are sentenced more often to prison terms for the same crimes as their white counterparts, and when they are, are often sentenced to longer or harsher terms, and are offered fewer plea bargains, probation, and rehabilitation as well in comparison to their white counterparts. I never said your numbers were wrong, I said that the interpretation is skewed. And it is. There has also been no significant 'proof' that black students 'do better on racially biased testing' as the anecdote of a single professor seems to attest to, whereas there is widespread evidence that the opposite is often the case to the tune of a more than 10% difference on scores in some tests.