On a state-and-local level we are seeing much the same thing.

The level of tax receipts coming in is not the problem.
The level of tax receipts coming in is not a problem at all.

It would be short-sighted/crazy for the government to spend money based on some notion that they will keep getting this much money in the foreseeable future.

That sharp decline at the end is a bad sign. It probably means there is some underlying problem in the underlying economy (But who knows? We have never fallen from such a high level before.)