I don't think I've ever been asked the question. Which is a pity, because there are so many good answers to give:
"Exactly as much as he has done for me."
"I have consistently abstained from boiling a goat in its mother's milk, which I understand is a big deal with him."
"Since people always tell me faith is empty when you have evidence, I make a point of frequently pointing out all the evidence that isn't there, so as to give more meaning to their faith. You're welcome."
"I don't direct any prayers his way, saving him the trouble of having to answer them."