The percentages will begin to even out given the current trends. It's not a racial thing, it's a rate of social decay thing.
We have about as many white meth-heads here as we do black crack user/dealers.
The white meth heads get the same amount of time in the pen for making it as as the blacks get for the the drugs.
but with the blacks, there are always, always a ton of priors, and usually include gun crimes