Is chiropractic quackery?

I know that some chiropractors, particularly in the UK claim to be able to cure all manner of shit including colic. And they can't.
But it seems to me that treating pain of the neck and back by manipulating the neck and back makes sense.

So does it work? Not really interested in anecdotal stories about it working for you so much as actual knowledge about the statistical efficacy of chiropractic