Forty percent of the Canadian GDP is exported to the global economy. So something on the order of half of international trade is intermediated by multinationals. This means that trade is not a company in Canada exporting to a party in the U.S. that's unrelated. It's all done within the multinational, because in this global economy, multinationals have to tap into global supply chains. It's part of the multinational network to service foreign markets.
To think that a Canadian company is going to sit inside Canadian borders, produce goods, and export them to the global economy without using a multinational network is simply incorrect.