The question wasn't why it matters, or how much it might matter, but simply if it's a decrease or not. Continued avoidance and deflection of the simple question speaks louder than an actual answer would. That certainly puts it to rest indeed.
It's irrelevant to this discussion. The judge threw out the testimony. The question is indeed why does it matter? It doesn't. If an exhibit is introduced, expect the relevancy of the exhibit to be questioned. Additionally it's not even proven to be factual.