Sorry, but check your facts. The US production in the last TEN years has been over 12 billion; Canadian has NEVER gotten above 3. Not sure why you repeated the US lumber demanded when I already mentioned it myself; the US is buying its own lumber from American producers AND Canadian lumber.
You can suspect the numbers all you like, they are updated to 2005. Do some research; most of the stats are professional subscription-only sites, but you can find them.
Get over your Canadian pride. ;)
Then why have U.S. lumber producers been going out of business in record numbers in the five years since the tariff has been imposed?
http://www.cbc.ca/cp/business/060403/b040386.html
If you really are interested in the facts, this article may help. The WTO ruling has no force in law, while the NAFTA rulings, which have been consistently in favor of Canada, does. Pride has nothing to do with it.