No, we have not done that study.
Actually, it's interesting, the decline in oil prices. The Brent and WTI have been more in decline than the Western Canadian Select price, which is actually beneficial for Canada because most of the Alberta oil is sold at Western Canadian Select price. We haven't really done any study as to what portion of that differential is due to the access.
There will always be a differential because there are different qualities of oil, kinds of oil. What portion of that is due to access or a lack of pipeline, I cannot answer.