That's difficult for me to judge. It's going to be different from country to country. When I was President of the Treasury Board here, we always had that argument with the tax department. If we had more inspectors it would increase exponentially the amount of revenue that could be recovered. That's always an argument of the revenue officials, and there's obviously some truth in it. But there's also a point of diminishing returns.
In the case of what we're looking at here, I don't have the numbers, but I think you'll find that the voluntary disclosure mechanisms that countries have introduced have been quite effective. I was looking at some of the numbers in the United States and I've heard some in Canada and I expect it's true right around the system. That's where most of the money will be recouped, even in the absence of signing agreements.