Any type of closure at an industrial plant that requires ongoing maintenance has an impact on work hours. So if you have 36 refineries across Canada one year, and then the next year you only have 15—which I think are the numbers—over time it absolutely impacts work hours associated with the maintenance of those projects. However, at the other end of the spectrum, it's the extraction that is really the driver for new construction jobs. You can build a refinery and it costs $7 billion to build, but in order to have that refinery you need to get raw materials to it.
So, absolutely, when you close a refinery, it impacts the construction and maintenance crews who go in there and do the maintenance. However, so far that work has traditionally been replaced by extraction increases and pipeline work. So it's a balancing act, but overall work hours and the size of the construction industry in the time period when those refineries were closing have gone from, I guess, 400,000 or 500,000 people to 1.2 million or 1.3 million. In the refining business, you've had shutdowns, but at the same time you've had this enormous growth in the other parts of the construction industry.