Well, in May 2008, the Prime Minister was speaking about the estimates done under Turning the Corner, announced in 2007. In 2008 we published a detailed modelling study of the economic and emissions reduction impacts of that plan, which you may have seen back then, and it also included that $65-a-tonne figure. It was based on the compliance regime that was being envisaged at that time.
In terms of the work of the national round table, they've been doing some modelling that looks, overall, at what the economy-wide costs would be of achieving a target domestically, and then at policy design issues that might help to contain those costs, which is a very important part of any discussion. It really depends on the parameters you're using and the assumptions and policy choices you're testing in any model that will tell you what the actual carbon price might be.