Seems like a mixed bag. Without knowing what people are being arrested for, many of these numbers are meaningless. For example... if all the asians were arrested for trespassing and all the whites for murder, it would have a large impact on how you viewed the numbers. 

It would be useful to see similar stats based on income levels, then compare the race numbers to the income numbers.

My point is that the less money you have, the greater the chance you're going to jail.   I have no doubt that being black probably adds a few percentage points on top of that, but the prime factor? I'm not so sure.

I spent my share of time with jail/prison/probation decades ago and I can assure you that the one thing almost everyone there had in common was a lack of money.