Oh, I doubt he really wanted that. The sort of thing I suspect he was actually referencing is the "black people commit X% of all crimes" / "racial differences in IQ test scores show..." talking points. (Or their equivalents in other fields. Women-in-computer-science, etc.)
Why is possession of crack a more serious offense than possession of the same quantity of powder cocaine?
Is the single crime of selling a loose cigarette on the street equivalent to the single crime of defrauding tens of millions of dollars from investors?
How many officers are tasked with arresting people for "quality of life" offenses like loitering and disturbing the peace vs. tasked with arresting people for wage theft through unpaid overtime and time card fraud?
Are your statistics for "committing" crime in fact statistics for convictions? Are there systemic reasons those might be very different numbers?
If all of these are more useful subjects for discussion, what is the purpose of even making the original statement?