I have a second question that has nothing to do with this. When you were talking about the capital cost allowance, in terms of incentives to repair or update old diesel engines for environmental reasons, earlier this week I attended a dinner with the Canadian automobile manufacturers association. They had some interesting numbers, one being that a 20-year-old car produces as much greenhouse gas as 37 new cars. There has been such a dramatic increase, and we encourage them to get those numbers out there in the public, so that people could appreciate the benefit of getting some of these older units off the road.
In terms of diesel engine emissions, do you know of any numbers, in terms of a modern unit today compared to 10 years ago or 20 years ago? What have the improvements been?