It actually says 2016. Ergo, nothing Trump has done is to be credited for it.
We shouldn’t anyway; conflation of the President to economic performance is bad practice. The President does not control the economy, he does not lead it, he does not set its pace; it can rise or fall completely independently of his priorities.
The President can impact it poorly, surely enough. Besides that, any good consequence is a result of the economy affirming itself, just like it did before we thought the Government had any useful contribution on the matter.