I'd say not enough. You still don't hear it.
I've heard him say it as many times as you have. A lie repeated one million times is a lie. We look to other evidence to determine veracity.
We also know that the law about removing feeding tubes was not changed until long after Terri's injuries. She could not possibly have made an informed choice to put herself to death by removal of hydration. It is Michael Schiavo's name on the death order.